diff --git a/flake.nix b/flake.nix
index 2c9d74c137ecb..e3655b627ebe5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -29,7 +29,6 @@
             poetry
 
             # backend
-            go_1_22
             gofumpt
             sqlite
           ];
diff --git a/models/db/collation.go b/models/db/collation.go
index c128cf502955e..a7db9f54423b9 100644
--- a/models/db/collation.go
+++ b/models/db/collation.go
@@ -68,7 +68,8 @@ func CheckCollations(x *xorm.Engine) (*CheckCollationsResult, error) {
 
 	var candidateCollations []string
 	if x.Dialect().URI().DBType == schemas.MYSQL {
-		if _, err = x.SQL("SELECT @@collation_database").Get(&res.DatabaseCollation); err != nil {
+		_, err = x.SQL("SELECT DEFAULT_COLLATION_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME = ?", setting.Database.Name).Get(&res.DatabaseCollation)
+		if err != nil {
 			return nil, err
 		}
 		res.IsCollationCaseSensitive = func(s string) bool {
diff --git a/models/repo/fork.go b/models/repo/fork.go
index 07cd31c2690a9..1c75e86458b2f 100644
--- a/models/repo/fork.go
+++ b/models/repo/fork.go
@@ -54,21 +54,6 @@ func GetUserFork(ctx context.Context, repoID, userID int64) (*Repository, error)
 	return &forkedRepo, nil
 }
 
-// GetForks returns all the forks of the repository
-func GetForks(ctx context.Context, repo *Repository, listOptions db.ListOptions) ([]*Repository, error) {
-	sess := db.GetEngine(ctx)
-
-	var forks []*Repository
-	if listOptions.Page == 0 {
-		forks = make([]*Repository, 0, repo.NumForks)
-	} else {
-		forks = make([]*Repository, 0, listOptions.PageSize)
-		sess = db.SetSessionPagination(sess, &listOptions)
-	}
-
-	return forks, sess.Find(&forks, &Repository{ForkID: repo.ID})
-}
-
 // IncrementRepoForkNum increment repository fork number
 func IncrementRepoForkNum(ctx context.Context, repoID int64) error {
 	_, err := db.GetEngine(ctx).Exec("UPDATE `repository` SET num_forks=num_forks+1 WHERE id=?", repoID)
diff --git a/models/repo/pushmirror.go b/models/repo/pushmirror.go
index bf134abfb152a..55e8f3a068f28 100644
--- a/models/repo/pushmirror.go
+++ b/models/repo/pushmirror.go
@@ -9,15 +9,13 @@ import (
 
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/optional"
 	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/util"
 
 	"xorm.io/builder"
 )
 
-// ErrPushMirrorNotExist mirror does not exist error
-var ErrPushMirrorNotExist = util.NewNotExistErrorf("PushMirror does not exist")
-
 // PushMirror represents mirror information of a repository.
 type PushMirror struct {
 	ID            int64       `xorm:"pk autoincr"`
@@ -96,26 +94,46 @@ func DeletePushMirrors(ctx context.Context, opts PushMirrorOptions) error {
 	return util.NewInvalidArgumentErrorf("repoID required and must be set")
 }
 
+type findPushMirrorOptions struct {
+	db.ListOptions
+	RepoID       int64
+	SyncOnCommit optional.Option[bool]
+}
+
+func (opts findPushMirrorOptions) ToConds() builder.Cond {
+	cond := builder.NewCond()
+	if opts.RepoID > 0 {
+		cond = cond.And(builder.Eq{"repo_id": opts.RepoID})
+	}
+	if opts.SyncOnCommit.Has() {
+		cond = cond.And(builder.Eq{"sync_on_commit": opts.SyncOnCommit.Value()})
+	}
+	return cond
+}
+
 // GetPushMirrorsByRepoID returns push-mirror information of a repository.
 func GetPushMirrorsByRepoID(ctx context.Context, repoID int64, listOptions db.ListOptions) ([]*PushMirror, int64, error) {
-	sess := db.GetEngine(ctx).Where("repo_id = ?", repoID)
-	if listOptions.Page != 0 {
-		sess = db.SetSessionPagination(sess, &listOptions)
-		mirrors := make([]*PushMirror, 0, listOptions.PageSize)
-		count, err := sess.FindAndCount(&mirrors)
-		return mirrors, count, err
+	return db.FindAndCount[PushMirror](ctx, findPushMirrorOptions{
+		ListOptions: listOptions,
+		RepoID:      repoID,
+	})
+}
+
+func GetPushMirrorByIDAndRepoID(ctx context.Context, id, repoID int64) (*PushMirror, bool, error) {
+	var pushMirror PushMirror
+	has, err := db.GetEngine(ctx).Where("id = ?", id).And("repo_id = ?", repoID).Get(&pushMirror)
+	if !has || err != nil {
+		return nil, has, err
 	}
-	mirrors := make([]*PushMirror, 0, 10)
-	count, err := sess.FindAndCount(&mirrors)
-	return mirrors, count, err
+	return &pushMirror, true, nil
 }
 
 // GetPushMirrorsSyncedOnCommit returns push-mirrors for this repo that should be updated by new commits
 func GetPushMirrorsSyncedOnCommit(ctx context.Context, repoID int64) ([]*PushMirror, error) {
-	mirrors := make([]*PushMirror, 0, 10)
-	return mirrors, db.GetEngine(ctx).
-		Where("repo_id = ? AND sync_on_commit = ?", repoID, true).
-		Find(&mirrors)
+	return db.Find[PushMirror](ctx, findPushMirrorOptions{
+		RepoID:       repoID,
+		SyncOnCommit: optional.Some(true),
+	})
 }
 
 // PushMirrorsIterate iterates all push-mirror repositories.
diff --git a/models/repo/repo_list.go b/models/repo/repo_list.go
index 1bffadbf0ae42..9bed2e919723b 100644
--- a/models/repo/repo_list.go
+++ b/models/repo/repo_list.go
@@ -98,8 +98,7 @@ func (repos RepositoryList) IDs() []int64 {
 	return repoIDs
 }
 
-// LoadAttributes loads the attributes for the given RepositoryList
-func (repos RepositoryList) LoadAttributes(ctx context.Context) error {
+func (repos RepositoryList) LoadOwners(ctx context.Context) error {
 	if len(repos) == 0 {
 		return nil
 	}
@@ -107,10 +106,6 @@ func (repos RepositoryList) LoadAttributes(ctx context.Context) error {
 	userIDs := container.FilterSlice(repos, func(repo *Repository) (int64, bool) {
 		return repo.OwnerID, true
 	})
-	repoIDs := make([]int64, len(repos))
-	for i := range repos {
-		repoIDs[i] = repos[i].ID
-	}
 
 	// Load owners.
 	users := make(map[int64]*user_model.User, len(userIDs))
@@ -123,12 +118,19 @@ func (repos RepositoryList) LoadAttributes(ctx context.Context) error {
 	for i := range repos {
 		repos[i].Owner = users[repos[i].OwnerID]
 	}
+	return nil
+}
+
+func (repos RepositoryList) LoadLanguageStats(ctx context.Context) error {
+	if len(repos) == 0 {
+		return nil
+	}
 
 	// Load primary language.
 	stats := make(LanguageStatList, 0, len(repos))
 	if err := db.GetEngine(ctx).
 		Where("`is_primary` = ? AND `language` != ?", true, "other").
-		In("`repo_id`", repoIDs).
+		In("`repo_id`", repos.IDs()).
 		Find(&stats); err != nil {
 		return fmt.Errorf("find primary languages: %w", err)
 	}
@@ -141,10 +143,18 @@ func (repos RepositoryList) LoadAttributes(ctx context.Context) error {
 			}
 		}
 	}
-
 	return nil
 }
 
+// LoadAttributes loads the attributes for the given RepositoryList
+func (repos RepositoryList) LoadAttributes(ctx context.Context) error {
+	if err := repos.LoadOwners(ctx); err != nil {
+		return err
+	}
+
+	return repos.LoadLanguageStats(ctx)
+}
+
 // SearchRepoOptions holds the search options
 type SearchRepoOptions struct {
 	db.ListOptions
diff --git a/modules/html/html.go b/modules/html/html.go
deleted file mode 100644
index b1ebd584c6b6d..0000000000000
--- a/modules/html/html.go
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright 2022 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package html
-
-// ParseSizeAndClass get size and class from string with default values
-// If present, "others" expects the new size first and then the classes to use
-func ParseSizeAndClass(defaultSize int, defaultClass string, others ...any) (int, string) {
-	size := defaultSize
-	if len(others) >= 1 {
-		if v, ok := others[0].(int); ok && v != 0 {
-			size = v
-		}
-	}
-	class := defaultClass
-	if len(others) >= 2 {
-		if v, ok := others[1].(string); ok && v != "" {
-			if class != "" {
-				class += " "
-			}
-			class += v
-		}
-	}
-	return size, class
-}
diff --git a/modules/htmlutil/html.go b/modules/htmlutil/html.go
new file mode 100644
index 0000000000000..9b5f5a92d89a8
--- /dev/null
+++ b/modules/htmlutil/html.go
@@ -0,0 +1,48 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package htmlutil
+
+import (
+	"fmt"
+	"html/template"
+	"slices"
+)
+
+// ParseSizeAndClass get size and class from string with default values
+// If present, "others" expects the new size first and then the classes to use
+func ParseSizeAndClass(defaultSize int, defaultClass string, others ...any) (int, string) {
+	size := defaultSize
+	if len(others) >= 1 {
+		if v, ok := others[0].(int); ok && v != 0 {
+			size = v
+		}
+	}
+	class := defaultClass
+	if len(others) >= 2 {
+		if v, ok := others[1].(string); ok && v != "" {
+			if class != "" {
+				class += " "
+			}
+			class += v
+		}
+	}
+	return size, class
+}
+
+func HTMLFormat(s string, rawArgs ...any) template.HTML {
+	args := slices.Clone(rawArgs)
+	for i, v := range args {
+		switch v := v.(type) {
+		case nil, bool, int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, float32, float64, template.HTML:
+			// for most basic types (including template.HTML which is safe), just do nothing and use it
+		case string:
+			args[i] = template.HTMLEscapeString(v)
+		case fmt.Stringer:
+			args[i] = template.HTMLEscapeString(v.String())
+		default:
+			args[i] = template.HTMLEscapeString(fmt.Sprint(v))
+		}
+	}
+	return template.HTML(fmt.Sprintf(s, args...))
+}
diff --git a/modules/htmlutil/html_test.go b/modules/htmlutil/html_test.go
new file mode 100644
index 0000000000000..5ff05d75b36cc
--- /dev/null
+++ b/modules/htmlutil/html_test.go
@@ -0,0 +1,15 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package htmlutil
+
+import (
+	"html/template"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestHTMLFormat(t *testing.T) {
+	assert.Equal(t, template.HTML("<a>&lt; < 1</a>"), HTMLFormat("<a>%s %s %d</a>", "<", template.HTML("<"), 1))
+}
diff --git a/modules/markup/asciicast/asciicast.go b/modules/markup/asciicast/asciicast.go
index 06780623403a4..e92b78a4bcad6 100644
--- a/modules/markup/asciicast/asciicast.go
+++ b/modules/markup/asciicast/asciicast.go
@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"io"
 	"net/url"
-	"regexp"
 
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/setting"
@@ -38,10 +37,7 @@ const (
 
 // SanitizerRules implements markup.Renderer
 func (Renderer) SanitizerRules() []setting.MarkupSanitizerRule {
-	return []setting.MarkupSanitizerRule{
-		{Element: "div", AllowAttr: "class", Regexp: regexp.MustCompile(playerClassName)},
-		{Element: "div", AllowAttr: playerSrcAttr},
-	}
+	return []setting.MarkupSanitizerRule{{Element: "div", AllowAttr: playerSrcAttr}}
 }
 
 // Render implements markup.Renderer
@@ -53,12 +49,5 @@ func (Renderer) Render(ctx *markup.RenderContext, _ io.Reader, output io.Writer)
 		ctx.Metas["BranchNameSubURL"],
 		url.PathEscape(ctx.RelativePath),
 	)
-
-	_, err := io.WriteString(output, fmt.Sprintf(
-		`<div class="%s" %s="%s"></div>`,
-		playerClassName,
-		playerSrcAttr,
-		rawURL,
-	))
-	return err
+	return ctx.RenderInternal.FormatWithSafeAttrs(output, `<div class="%s" %s="%s"></div>`, playerClassName, playerSrcAttr, rawURL)
 }
diff --git a/modules/markup/common/html.go b/modules/markup/common/html.go
deleted file mode 100644
index 5658839c6fc37..0000000000000
--- a/modules/markup/common/html.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2019 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package common
-
-import (
-	"mvdan.cc/xurls/v2"
-)
-
-// NOTE: All below regex matching do not perform any extra validation.
-// Thus a link is produced even if the linked entity does not exist.
-// While fast, this is also incorrect and lead to false positives.
-// TODO: fix invalid linking issue
-
-// LinkRegex is a regexp matching a valid link
-var LinkRegex, _ = xurls.StrictMatchingScheme("https?://")
diff --git a/modules/markup/common/linkify.go b/modules/markup/common/linkify.go
index f84680205e888..be6ab22b55f49 100644
--- a/modules/markup/common/linkify.go
+++ b/modules/markup/common/linkify.go
@@ -9,15 +9,27 @@ package common
 import (
 	"bytes"
 	"regexp"
+	"sync"
 
 	"github.com/yuin/goldmark"
 	"github.com/yuin/goldmark/ast"
 	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/text"
 	"github.com/yuin/goldmark/util"
+	"mvdan.cc/xurls/v2"
 )
 
-var wwwURLRegxp = regexp.MustCompile(`^www\.[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}((?:/|[#?])[-a-zA-Z0-9@:%_\+.~#!?&//=\(\);,'">\^{}\[\]` + "`" + `]*)?`)
+type GlobalVarsType struct {
+	wwwURLRegxp *regexp.Regexp
+	LinkRegex   *regexp.Regexp // fast matching a URL link, no any extra validation.
+}
+
+var GlobalVars = sync.OnceValue[*GlobalVarsType](func() *GlobalVarsType {
+	v := &GlobalVarsType{}
+	v.wwwURLRegxp = regexp.MustCompile(`^www\.[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}((?:/|[#?])[-a-zA-Z0-9@:%_\+.~#!?&//=\(\);,'">\^{}\[\]` + "`" + `]*)?`)
+	v.LinkRegex, _ = xurls.StrictMatchingScheme("https?://")
+	return v
+})
 
 type linkifyParser struct{}
 
@@ -60,10 +72,10 @@ func (s *linkifyParser) Parse(parent ast.Node, block text.Reader, pc parser.Cont
 	var protocol []byte
 	typ := ast.AutoLinkURL
 	if bytes.HasPrefix(line, protoHTTP) || bytes.HasPrefix(line, protoHTTPS) || bytes.HasPrefix(line, protoFTP) {
-		m = LinkRegex.FindSubmatchIndex(line)
+		m = GlobalVars().LinkRegex.FindSubmatchIndex(line)
 	}
 	if m == nil && bytes.HasPrefix(line, domainWWW) {
-		m = wwwURLRegxp.FindSubmatchIndex(line)
+		m = GlobalVars().wwwURLRegxp.FindSubmatchIndex(line)
 		protocol = []byte("http")
 	}
 	if m != nil {
diff --git a/modules/markup/console/console.go b/modules/markup/console/console.go
index d991527b80f59..06f3acfa68948 100644
--- a/modules/markup/console/console.go
+++ b/modules/markup/console/console.go
@@ -6,8 +6,7 @@ package console
 import (
 	"bytes"
 	"io"
-	"path/filepath"
-	"regexp"
+	"path"
 
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/setting"
@@ -36,7 +35,7 @@ func (Renderer) Extensions() []string {
 // SanitizerRules implements markup.Renderer
 func (Renderer) SanitizerRules() []setting.MarkupSanitizerRule {
 	return []setting.MarkupSanitizerRule{
-		{Element: "span", AllowAttr: "class", Regexp: regexp.MustCompile(`^term-((fg[ix]?|bg)\d+|container)$`)},
+		{Element: "span", AllowAttr: "class", Regexp: `^term-((fg[ix]?|bg)\d+|container)$`},
 	}
 }
 
@@ -46,7 +45,7 @@ func (Renderer) CanRender(filename string, input io.Reader) bool {
 	if err != nil {
 		return false
 	}
-	if enry.GetLanguage(filepath.Base(filename), buf) != enry.OtherLanguage {
+	if enry.GetLanguage(path.Base(filename), buf) != enry.OtherLanguage {
 		return false
 	}
 	return bytes.ContainsRune(buf, '\x1b')
diff --git a/modules/markup/csv/csv.go b/modules/markup/csv/csv.go
index 3d952b0de4fe3..a3e6bbaac6830 100644
--- a/modules/markup/csv/csv.go
+++ b/modules/markup/csv/csv.go
@@ -7,7 +7,6 @@ import (
 	"bufio"
 	"html"
 	"io"
-	"regexp"
 	"strconv"
 
 	"code.gitea.io/gitea/modules/csv"
@@ -37,9 +36,9 @@ func (Renderer) Extensions() []string {
 // SanitizerRules implements markup.Renderer
 func (Renderer) SanitizerRules() []setting.MarkupSanitizerRule {
 	return []setting.MarkupSanitizerRule{
-		{Element: "table", AllowAttr: "class", Regexp: regexp.MustCompile(`data-table`)},
-		{Element: "th", AllowAttr: "class", Regexp: regexp.MustCompile(`line-num`)},
-		{Element: "td", AllowAttr: "class", Regexp: regexp.MustCompile(`line-num`)},
+		{Element: "table", AllowAttr: "class", Regexp: `^data-table$`},
+		{Element: "th", AllowAttr: "class", Regexp: `^line-num$`},
+		{Element: "td", AllowAttr: "class", Regexp: `^line-num$`},
 	}
 }
 
@@ -51,13 +50,13 @@ func writeField(w io.Writer, element, class, field string) error {
 		return err
 	}
 	if len(class) > 0 {
-		if _, err := io.WriteString(w, " class=\""); err != nil {
+		if _, err := io.WriteString(w, ` class="`); err != nil {
 			return err
 		}
 		if _, err := io.WriteString(w, class); err != nil {
 			return err
 		}
-		if _, err := io.WriteString(w, "\""); err != nil {
+		if _, err := io.WriteString(w, `"`); err != nil {
 			return err
 		}
 	}
diff --git a/modules/markup/external/external.go b/modules/markup/external/external.go
index 122517ed11c0a..d28dc9fa5d19a 100644
--- a/modules/markup/external/external.go
+++ b/modules/markup/external/external.go
@@ -102,7 +102,7 @@ func (p *Renderer) Render(ctx *markup.RenderContext, input io.Reader, output io.
 
 		_, err = io.Copy(f, input)
 		if err != nil {
-			f.Close()
+			_ = f.Close()
 			return fmt.Errorf("%s write data to temp file when rendering %s failed: %w", p.Name(), p.Command, err)
 		}
 
@@ -113,10 +113,9 @@ func (p *Renderer) Render(ctx *markup.RenderContext, input io.Reader, output io.
 		args = append(args, f.Name())
 	}
 
-	if ctx == nil || ctx.Ctx == nil {
-		if ctx == nil {
-			log.Warn("RenderContext not provided defaulting to empty ctx")
-			ctx = &markup.RenderContext{}
+	if ctx.Ctx == nil {
+		if !setting.IsProd || setting.IsInTesting {
+			panic("RenderContext did not provide context")
 		}
 		log.Warn("RenderContext did not provide context, defaulting to Shutdown context")
 		ctx.Ctx = graceful.GetManager().ShutdownContext()
diff --git a/modules/markup/html.go b/modules/markup/html.go
index 16ccd4b40672f..e8799c401c537 100644
--- a/modules/markup/html.go
+++ b/modules/markup/html.go
@@ -25,9 +25,6 @@ const (
 	IssueNameStyleRegexp       = "regexp"
 )
 
-// CSS class for action keywords (e.g. "closes: #1")
-const keywordClass = "issue-keyword"
-
 type globalVarsType struct {
 	hashCurrentPattern      *regexp.Regexp
 	shortLinkPattern        *regexp.Regexp
@@ -39,6 +36,7 @@ type globalVarsType struct {
 	emojiShortCodeRegex     *regexp.Regexp
 	issueFullPattern        *regexp.Regexp
 	filesChangedFullPattern *regexp.Regexp
+	codePreviewPattern      *regexp.Regexp
 
 	tagCleaner *regexp.Regexp
 	nulCleaner *strings.Replacer
@@ -88,6 +86,9 @@ var globalVars = sync.OnceValue[*globalVarsType](func() *globalVarsType {
 	// example: https://domain/org/repo/pulls/27/files#hash
 	v.filesChangedFullPattern = regexp.MustCompile(`https?://(?:\S+/)[\w_.-]+/[\w_.-]+/pulls/((?:\w{1,10}-)?[1-9][0-9]*)/files([\?|#](\S+)?)?\b`)
 
+	// codePreviewPattern matches "http://domain/.../{owner}/{repo}/src/commit/{commit}/{filepath}#L10-L20"
+	v.codePreviewPattern = regexp.MustCompile(`https?://\S+/([^\s/]+)/([^\s/]+)/src/commit/([0-9a-f]{7,64})(/\S+)#(L\d+(-L\d+)?)`)
+
 	v.tagCleaner = regexp.MustCompile(`<((?:/?\w+/\w+)|(?:/[\w ]+/)|(/?[hH][tT][mM][lL]\b)|(/?[hH][eE][aA][dD]\b))`)
 	v.nulCleaner = strings.NewReplacer("\000", "")
 	return v
@@ -129,7 +130,7 @@ func CustomLinkURLSchemes(schemes []string) {
 		}
 		withAuth = append(withAuth, s)
 	}
-	common.LinkRegex, _ = xurls.StrictMatchingScheme(strings.Join(withAuth, "|"))
+	common.GlobalVars().LinkRegex, _ = xurls.StrictMatchingScheme(strings.Join(withAuth, "|"))
 }
 
 type postProcessError struct {
@@ -164,11 +165,7 @@ var defaultProcessors = []processor{
 // emails with HTML links, parsing shortlinks in the format of [[Link]], like
 // MediaWiki, linking issues in the format #ID, and mentions in the format
 // @user, and others.
-func PostProcess(
-	ctx *RenderContext,
-	input io.Reader,
-	output io.Writer,
-) error {
+func PostProcess(ctx *RenderContext, input io.Reader, output io.Writer) error {
 	return postProcess(ctx, defaultProcessors, input, output)
 }
 
@@ -189,10 +186,7 @@ var commitMessageProcessors = []processor{
 // RenderCommitMessage will use the same logic as PostProcess, but will disable
 // the shortLinkProcessor and will add a defaultLinkProcessor if defaultLink is
 // set, which changes every text node into a link to the passed default link.
-func RenderCommitMessage(
-	ctx *RenderContext,
-	content string,
-) (string, error) {
+func RenderCommitMessage(ctx *RenderContext, content string) (string, error) {
 	procs := commitMessageProcessors
 	return renderProcessString(ctx, procs, content)
 }
@@ -219,10 +213,7 @@ var emojiProcessors = []processor{
 // RenderCommitMessage, but will disable the shortLinkProcessor and
 // emailAddressProcessor, will add a defaultLinkProcessor if defaultLink is set,
 // which changes every text node into a link to the passed default link.
-func RenderCommitMessageSubject(
-	ctx *RenderContext,
-	defaultLink, content string,
-) (string, error) {
+func RenderCommitMessageSubject(ctx *RenderContext, defaultLink, content string) (string, error) {
 	procs := slices.Clone(commitMessageSubjectProcessors)
 	procs = append(procs, func(ctx *RenderContext, node *html.Node) {
 		ch := &html.Node{Parent: node, Type: html.TextNode, Data: node.Data}
@@ -236,10 +227,7 @@ func RenderCommitMessageSubject(
 }
 
 // RenderIssueTitle to process title on individual issue/pull page
-func RenderIssueTitle(
-	ctx *RenderContext,
-	title string,
-) (string, error) {
+func RenderIssueTitle(ctx *RenderContext, title string) (string, error) {
 	// do not render other issue/commit links in an issue's title - which in most cases is already a link.
 	return renderProcessString(ctx, []processor{
 		emojiShortCodeProcessor,
@@ -257,10 +245,7 @@ func renderProcessString(ctx *RenderContext, procs []processor, content string)
 
 // RenderDescriptionHTML will use similar logic as PostProcess, but will
 // use a single special linkProcessor.
-func RenderDescriptionHTML(
-	ctx *RenderContext,
-	content string,
-) (string, error) {
+func RenderDescriptionHTML(ctx *RenderContext, content string) (string, error) {
 	return renderProcessString(ctx, []processor{
 		descriptionLinkProcessor,
 		emojiShortCodeProcessor,
@@ -270,10 +255,7 @@ func RenderDescriptionHTML(
 
 // RenderEmoji for when we want to just process emoji and shortcodes
 // in various places it isn't already run through the normal markdown processor
-func RenderEmoji(
-	ctx *RenderContext,
-	content string,
-) (string, error) {
+func RenderEmoji(ctx *RenderContext, content string) (string, error) {
 	return renderProcessString(ctx, emojiProcessors, content)
 }
 
@@ -333,6 +315,17 @@ func postProcess(ctx *RenderContext, procs []processor, input io.Reader, output
 	return nil
 }
 
+func isEmojiNode(node *html.Node) bool {
+	if node.Type == html.ElementNode && node.Data == atom.Span.String() {
+		for _, attr := range node.Attr {
+			if (attr.Key == "class" || attr.Key == "data-attr-class") && strings.Contains(attr.Val, "emoji") {
+				return true
+			}
+		}
+	}
+	return false
+}
+
 func visitNode(ctx *RenderContext, procs []processor, node *html.Node) *html.Node {
 	// Add user-content- to IDs and "#" links if they don't already have them
 	for idx, attr := range node.Attr {
@@ -346,47 +339,27 @@ func visitNode(ctx *RenderContext, procs []processor, node *html.Node) *html.Nod
 		if attr.Key == "href" && strings.HasPrefix(attr.Val, "#") && notHasPrefix {
 			node.Attr[idx].Val = "#user-content-" + val
 		}
-
-		if attr.Key == "class" && attr.Val == "emoji" {
-			procs = nil
-		}
 	}
 
 	switch node.Type {
 	case html.TextNode:
-		processTextNodes(ctx, procs, node)
+		for _, proc := range procs {
+			proc(ctx, node) // it might add siblings
+		}
+
 	case html.ElementNode:
-		if node.Data == "code" || node.Data == "pre" {
-			// ignore code and pre nodes
+		if isEmojiNode(node) {
+			// TextNode emoji will be converted to `<span class="emoji">`, then the next iteration will visit the "span"
+			// if we don't stop it, it will go into the TextNode again and create an infinite recursion
 			return node.NextSibling
+		} else if node.Data == "code" || node.Data == "pre" {
+			return node.NextSibling // ignore code and pre nodes
 		} else if node.Data == "img" {
 			return visitNodeImg(ctx, node)
 		} else if node.Data == "video" {
 			return visitNodeVideo(ctx, node)
 		} else if node.Data == "a" {
-			// Restrict text in links to emojis
-			procs = emojiProcessors
-		} else if node.Data == "i" {
-			for _, attr := range node.Attr {
-				if attr.Key != "class" {
-					continue
-				}
-				classes := strings.Split(attr.Val, " ")
-				for i, class := range classes {
-					if class == "icon" {
-						classes[0], classes[i] = classes[i], classes[0]
-						attr.Val = strings.Join(classes, " ")
-
-						// Remove all children of icons
-						child := node.FirstChild
-						for child != nil {
-							node.RemoveChild(child)
-							child = node.FirstChild
-						}
-						break
-					}
-				}
-			}
+			procs = emojiProcessors // Restrict text in links to emojis
 		}
 		for n := node.FirstChild; n != nil; {
 			n = visitNode(ctx, procs, n)
@@ -396,22 +369,17 @@ func visitNode(ctx *RenderContext, procs []processor, node *html.Node) *html.Nod
 	return node.NextSibling
 }
 
-// processTextNodes runs the passed node through various processors, in order to handle
-// all kinds of special links handled by the post-processing.
-func processTextNodes(ctx *RenderContext, procs []processor, node *html.Node) {
-	for _, p := range procs {
-		p(ctx, node)
-	}
-}
-
 // createKeyword() renders a highlighted version of an action keyword
-func createKeyword(content string) *html.Node {
+func createKeyword(ctx *RenderContext, content string) *html.Node {
+	// CSS class for action keywords (e.g. "closes: #1")
+	const keywordClass = "issue-keyword"
+
 	span := &html.Node{
 		Type: html.ElementNode,
 		Data: atom.Span.String(),
 		Attr: []html.Attribute{},
 	}
-	span.Attr = append(span.Attr, html.Attribute{Key: "class", Val: keywordClass})
+	span.Attr = append(span.Attr, ctx.RenderInternal.NodeSafeAttr("class", keywordClass))
 
 	text := &html.Node{
 		Type: html.TextNode,
@@ -422,7 +390,7 @@ func createKeyword(content string) *html.Node {
 	return span
 }
 
-func createLink(href, content, class string) *html.Node {
+func createLink(ctx *RenderContext, href, content, class string) *html.Node {
 	a := &html.Node{
 		Type: html.ElementNode,
 		Data: atom.A.String(),
@@ -432,7 +400,7 @@ func createLink(href, content, class string) *html.Node {
 		a.Attr = append(a.Attr, html.Attribute{Key: "data-markdown-generated-content"})
 	}
 	if class != "" {
-		a.Attr = append(a.Attr, html.Attribute{Key: "class", Val: class})
+		a.Attr = append(a.Attr, ctx.RenderInternal.NodeSafeAttr("class", class))
 	}
 
 	text := &html.Node{
diff --git a/modules/markup/html_codepreview.go b/modules/markup/html_codepreview.go
index 5ab9290b3e42f..5c88481d769ef 100644
--- a/modules/markup/html_codepreview.go
+++ b/modules/markup/html_codepreview.go
@@ -6,7 +6,6 @@ package markup
 import (
 	"html/template"
 	"net/url"
-	"regexp"
 	"strconv"
 	"strings"
 
@@ -16,9 +15,6 @@ import (
 	"golang.org/x/net/html"
 )
 
-// codePreviewPattern matches "http://domain/.../{owner}/{repo}/src/commit/{commit}/{filepath}#L10-L20"
-var codePreviewPattern = regexp.MustCompile(`https?://\S+/([^\s/]+)/([^\s/]+)/src/commit/([0-9a-f]{7,64})(/\S+)#(L\d+(-L\d+)?)`)
-
 type RenderCodePreviewOptions struct {
 	FullURL   string
 	OwnerName string
@@ -30,7 +26,7 @@ type RenderCodePreviewOptions struct {
 }
 
 func renderCodeBlock(ctx *RenderContext, node *html.Node) (urlPosStart, urlPosStop int, htm template.HTML, err error) {
-	m := codePreviewPattern.FindStringSubmatchIndex(node.Data)
+	m := globalVars().codePreviewPattern.FindStringSubmatchIndex(node.Data)
 	if m == nil {
 		return 0, 0, "", nil
 	}
@@ -66,8 +62,8 @@ func codePreviewPatternProcessor(ctx *RenderContext, node *html.Node) {
 			node = node.NextSibling
 			continue
 		}
-		urlPosStart, urlPosEnd, h, err := renderCodeBlock(ctx, node)
-		if err != nil || h == "" {
+		urlPosStart, urlPosEnd, renderedCodeBlock, err := renderCodeBlock(ctx, node)
+		if err != nil || renderedCodeBlock == "" {
 			if err != nil {
 				log.Error("Unable to render code preview: %v", err)
 			}
@@ -84,7 +80,8 @@ func codePreviewPatternProcessor(ctx *RenderContext, node *html.Node) {
 		//    then it is resolved as: "<p>{TextBefore}</p><div NewNode/><p>{TextAfter}</p>",
 		//    so unless it could correctly replace the parent "p/li" node, it is very difficult to eliminate the "TextBefore" empty node.
 		node.Data = textBefore
-		node.Parent.InsertBefore(&html.Node{Type: html.RawNode, Data: string(h)}, next)
+		renderedCodeNode := &html.Node{Type: html.RawNode, Data: string(ctx.RenderInternal.ProtectSafeAttrs(renderedCodeBlock))}
+		node.Parent.InsertBefore(renderedCodeNode, next)
 		if textAfter != "" {
 			node.Parent.InsertBefore(&html.Node{Type: html.TextNode, Data: textAfter}, next)
 		}
diff --git a/modules/markup/html_email.go b/modules/markup/html_email.go
index 32d0285eb4c46..cbfae8b82940e 100644
--- a/modules/markup/html_email.go
+++ b/modules/markup/html_email.go
@@ -15,7 +15,7 @@ func emailAddressProcessor(ctx *RenderContext, node *html.Node) {
 		}
 
 		mail := node.Data[m[2]:m[3]]
-		replaceContent(node, m[2], m[3], createLink("mailto:"+mail, mail, "mailto"))
+		replaceContent(node, m[2], m[3], createLink(ctx, "mailto:"+mail, mail, "" /*mailto*/))
 		node = node.NextSibling.NextSibling
 	}
 }
diff --git a/modules/markup/html_emoji.go b/modules/markup/html_emoji.go
index 6eacb2067f028..c63806542524c 100644
--- a/modules/markup/html_emoji.go
+++ b/modules/markup/html_emoji.go
@@ -13,15 +13,13 @@ import (
 	"golang.org/x/net/html/atom"
 )
 
-func createEmoji(content, class, name string) *html.Node {
+func createEmoji(ctx *RenderContext, content, name string) *html.Node {
 	span := &html.Node{
 		Type: html.ElementNode,
 		Data: atom.Span.String(),
 		Attr: []html.Attribute{},
 	}
-	if class != "" {
-		span.Attr = append(span.Attr, html.Attribute{Key: "class", Val: class})
-	}
+	span.Attr = append(span.Attr, ctx.RenderInternal.NodeSafeAttr("class", "emoji"))
 	if name != "" {
 		span.Attr = append(span.Attr, html.Attribute{Key: "aria-label", Val: name})
 	}
@@ -35,13 +33,13 @@ func createEmoji(content, class, name string) *html.Node {
 	return span
 }
 
-func createCustomEmoji(alias string) *html.Node {
+func createCustomEmoji(ctx *RenderContext, alias string) *html.Node {
 	span := &html.Node{
 		Type: html.ElementNode,
 		Data: atom.Span.String(),
 		Attr: []html.Attribute{},
 	}
-	span.Attr = append(span.Attr, html.Attribute{Key: "class", Val: "emoji"})
+	span.Attr = append(span.Attr, ctx.RenderInternal.NodeSafeAttr("class", "emoji"))
 	span.Attr = append(span.Attr, html.Attribute{Key: "aria-label", Val: alias})
 
 	img := &html.Node{
@@ -77,7 +75,7 @@ func emojiShortCodeProcessor(ctx *RenderContext, node *html.Node) {
 		if converted == nil {
 			// check if this is a custom reaction
 			if _, exist := setting.UI.CustomEmojisMap[alias]; exist {
-				replaceContent(node, m[0], m[1], createCustomEmoji(alias))
+				replaceContent(node, m[0], m[1], createCustomEmoji(ctx, alias))
 				node = node.NextSibling.NextSibling
 				start = 0
 				continue
@@ -85,7 +83,7 @@ func emojiShortCodeProcessor(ctx *RenderContext, node *html.Node) {
 			continue
 		}
 
-		replaceContent(node, m[0], m[1], createEmoji(converted.Emoji, "emoji", converted.Description))
+		replaceContent(node, m[0], m[1], createEmoji(ctx, converted.Emoji, converted.Description))
 		node = node.NextSibling.NextSibling
 		start = 0
 	}
@@ -107,7 +105,7 @@ func emojiProcessor(ctx *RenderContext, node *html.Node) {
 		start = m[1]
 		val := emoji.FromCode(codepoint)
 		if val != nil {
-			replaceContent(node, m[0], m[1], createEmoji(codepoint, "emoji", val.Description))
+			replaceContent(node, m[0], m[1], createEmoji(ctx, codepoint, val.Description))
 			node = node.NextSibling.NextSibling
 			start = 0
 		}
diff --git a/modules/markup/html_issue.go b/modules/markup/html_issue.go
index 2acf154ad2ad7..7341af7eb697b 100644
--- a/modules/markup/html_issue.go
+++ b/modules/markup/html_issue.go
@@ -57,10 +57,10 @@ func fullIssuePatternProcessor(ctx *RenderContext, node *html.Node) {
 		matchRepo := linkParts[len(linkParts)-3]
 
 		if matchOrg == ctx.Metas["user"] && matchRepo == ctx.Metas["repo"] {
-			replaceContent(node, m[0], m[1], createLink(link, text, "ref-issue"))
+			replaceContent(node, m[0], m[1], createLink(ctx, link, text, "ref-issue"))
 		} else {
 			text = matchOrg + "/" + matchRepo + text
-			replaceContent(node, m[0], m[1], createLink(link, text, "ref-issue"))
+			replaceContent(node, m[0], m[1], createLink(ctx, link, text, "ref-issue"))
 		}
 		node = node.NextSibling.NextSibling
 	}
@@ -129,16 +129,16 @@ func issueIndexPatternProcessor(ctx *RenderContext, node *html.Node) {
 				log.Error("unable to expand template vars for ref %s, err: %v", ref.Issue, err)
 			}
 
-			link = createLink(res, reftext, "ref-issue ref-external-issue")
+			link = createLink(ctx, res, reftext, "ref-issue ref-external-issue")
 		} else {
 			// Path determines the type of link that will be rendered. It's unknown at this point whether
 			// the linked item is actually a PR or an issue. Luckily it's of no real consequence because
 			// Gitea will redirect on click as appropriate.
 			issuePath := util.Iif(ref.IsPull, "pulls", "issues")
 			if ref.Owner == "" {
-				link = createLink(util.URLJoin(ctx.Links.Prefix(), ctx.Metas["user"], ctx.Metas["repo"], issuePath, ref.Issue), reftext, "ref-issue")
+				link = createLink(ctx, util.URLJoin(ctx.Links.Prefix(), ctx.Metas["user"], ctx.Metas["repo"], issuePath, ref.Issue), reftext, "ref-issue")
 			} else {
-				link = createLink(util.URLJoin(ctx.Links.Prefix(), ref.Owner, ref.Name, issuePath, ref.Issue), reftext, "ref-issue")
+				link = createLink(ctx, util.URLJoin(ctx.Links.Prefix(), ref.Owner, ref.Name, issuePath, ref.Issue), reftext, "ref-issue")
 			}
 		}
 
@@ -151,7 +151,7 @@ func issueIndexPatternProcessor(ctx *RenderContext, node *html.Node) {
 		// Decorate action keywords if actionable
 		var keyword *html.Node
 		if references.IsXrefActionable(ref, hasExtTrackFormat) {
-			keyword = createKeyword(node.Data[ref.ActionLocation.Start:ref.ActionLocation.End])
+			keyword = createKeyword(ctx, node.Data[ref.ActionLocation.Start:ref.ActionLocation.End])
 		} else {
 			keyword = &html.Node{
 				Type: html.TextNode,
@@ -177,7 +177,7 @@ func commitCrossReferencePatternProcessor(ctx *RenderContext, node *html.Node) {
 		}
 
 		reftext := ref.Owner + "/" + ref.Name + "@" + base.ShortSha(ref.CommitSha)
-		link := createLink(util.URLJoin(ctx.Links.Prefix(), ref.Owner, ref.Name, "commit", ref.CommitSha), reftext, "commit")
+		link := createLink(ctx, util.URLJoin(ctx.Links.Prefix(), ref.Owner, ref.Name, "commit", ref.CommitSha), reftext, "commit")
 
 		replaceContent(node, ref.RefLocation.Start, ref.RefLocation.End, link)
 		node = node.NextSibling.NextSibling
diff --git a/modules/markup/html_link.go b/modules/markup/html_link.go
index b7562d0aa6d26..32aa7dc614ca7 100644
--- a/modules/markup/html_link.go
+++ b/modules/markup/html_link.go
@@ -189,13 +189,13 @@ func shortLinkProcessor(ctx *RenderContext, node *html.Node) {
 func linkProcessor(ctx *RenderContext, node *html.Node) {
 	next := node.NextSibling
 	for node != nil && node != next {
-		m := common.LinkRegex.FindStringIndex(node.Data)
+		m := common.GlobalVars().LinkRegex.FindStringIndex(node.Data)
 		if m == nil {
 			return
 		}
 
 		uri := node.Data[m[0]:m[1]]
-		replaceContent(node, m[0], m[1], createLink(uri, uri, "link"))
+		replaceContent(node, m[0], m[1], createLink(ctx, uri, uri, "" /*link*/))
 		node = node.NextSibling.NextSibling
 	}
 }
@@ -204,7 +204,7 @@ func linkProcessor(ctx *RenderContext, node *html.Node) {
 func descriptionLinkProcessor(ctx *RenderContext, node *html.Node) {
 	next := node.NextSibling
 	for node != nil && node != next {
-		m := common.LinkRegex.FindStringIndex(node.Data)
+		m := common.GlobalVars().LinkRegex.FindStringIndex(node.Data)
 		if m == nil {
 			return
 		}
diff --git a/modules/markup/html_mention.go b/modules/markup/html_mention.go
index 3f0692e05f55e..f7e2ad50f139f 100644
--- a/modules/markup/html_mention.go
+++ b/modules/markup/html_mention.go
@@ -33,7 +33,7 @@ func mentionProcessor(ctx *RenderContext, node *html.Node) {
 		if ok && strings.Contains(mention, "/") {
 			mentionOrgAndTeam := strings.Split(mention, "/")
 			if mentionOrgAndTeam[0][1:] == ctx.Metas["org"] && strings.Contains(teams, ","+strings.ToLower(mentionOrgAndTeam[1])+",") {
-				replaceContent(node, loc.Start, loc.End, createLink(util.URLJoin(ctx.Links.Prefix(), "org", ctx.Metas["org"], "teams", mentionOrgAndTeam[1]), mention, "mention"))
+				replaceContent(node, loc.Start, loc.End, createLink(ctx, util.URLJoin(ctx.Links.Prefix(), "org", ctx.Metas["org"], "teams", mentionOrgAndTeam[1]), mention, "" /*mention*/))
 				node = node.NextSibling.NextSibling
 				start = 0
 				continue
@@ -44,7 +44,7 @@ func mentionProcessor(ctx *RenderContext, node *html.Node) {
 		mentionedUsername := mention[1:]
 
 		if DefaultProcessorHelper.IsUsernameMentionable != nil && DefaultProcessorHelper.IsUsernameMentionable(ctx.Ctx, mentionedUsername) {
-			replaceContent(node, loc.Start, loc.End, createLink(util.URLJoin(ctx.Links.Prefix(), mentionedUsername), mention, "mention"))
+			replaceContent(node, loc.Start, loc.End, createLink(ctx, util.URLJoin(ctx.Links.Prefix(), mentionedUsername), mention, "" /*mention*/))
 			node = node.NextSibling.NextSibling
 			start = 0
 		} else {
diff --git a/modules/markup/internal/finalprocessor.go b/modules/markup/internal/finalprocessor.go
new file mode 100644
index 0000000000000..14d46a161f0b8
--- /dev/null
+++ b/modules/markup/internal/finalprocessor.go
@@ -0,0 +1,30 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package internal
+
+import (
+	"bytes"
+	"io"
+)
+
+type finalProcessor struct {
+	renderInternal *RenderInternal
+
+	output io.Writer
+	buf    bytes.Buffer
+}
+
+func (p *finalProcessor) Write(data []byte) (int, error) {
+	p.buf.Write(data)
+	return len(data), nil
+}
+
+func (p *finalProcessor) Close() error {
+	// TODO: reading the whole markdown isn't a problem at the moment,
+	// because "postProcess" already does so. In the future we could optimize the code to process data on the fly.
+	buf := p.buf.Bytes()
+	buf = bytes.ReplaceAll(buf, []byte(` data-attr-class="`+p.renderInternal.secureIDPrefix), []byte(` class="`))
+	_, err := p.output.Write(buf)
+	return err
+}
diff --git a/modules/markup/internal/internal_test.go b/modules/markup/internal/internal_test.go
new file mode 100644
index 0000000000000..98ff3bc079208
--- /dev/null
+++ b/modules/markup/internal/internal_test.go
@@ -0,0 +1,61 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package internal
+
+import (
+	"bytes"
+	"html/template"
+	"io"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRenderInternal(t *testing.T) {
+	cases := []struct {
+		input, protected, recovered string
+	}{
+		{
+			input:     `<div class="test">class="content"</div>`,
+			protected: `<div data-attr-class="sec:test">class="content"</div>`,
+			recovered: `<div class="test">class="content"</div>`,
+		},
+		{
+			input:     "<div\nclass=\"test\" data-xxx></div>",
+			protected: `<div data-attr-class="sec:test" data-xxx></div>`,
+			recovered: `<div class="test" data-xxx></div>`,
+		},
+	}
+	for _, c := range cases {
+		var r RenderInternal
+		out := &bytes.Buffer{}
+		in := r.init("sec", out)
+		protected := r.ProtectSafeAttrs(template.HTML(c.input))
+		assert.EqualValues(t, c.protected, protected)
+		_, _ = io.WriteString(in, string(protected))
+		_ = in.Close()
+		assert.EqualValues(t, c.recovered, out.String())
+	}
+
+	var r1, r2 RenderInternal
+	protected := r1.ProtectSafeAttrs(`<div class="test"></div>`)
+	assert.EqualValues(t, `<div class="test"></div>`, protected, "non-initialized RenderInternal should not protect any attributes")
+	_ = r1.init("sec", nil)
+	protected = r1.ProtectSafeAttrs(`<div class="test"></div>`)
+	assert.EqualValues(t, `<div data-attr-class="sec:test"></div>`, protected)
+	assert.EqualValues(t, "data-attr-class", r1.SafeAttr("class"))
+	assert.EqualValues(t, "sec:val", r1.SafeValue("val"))
+	recovered, ok := r1.RecoverProtectedValue("sec:val")
+	assert.True(t, ok)
+	assert.EqualValues(t, "val", recovered)
+	recovered, ok = r1.RecoverProtectedValue("other:val")
+	assert.False(t, ok)
+	assert.Empty(t, recovered)
+
+	out2 := &bytes.Buffer{}
+	in2 := r2.init("sec-other", out2)
+	_, _ = io.WriteString(in2, string(protected))
+	_ = in2.Close()
+	assert.EqualValues(t, `<div data-attr-class="sec:test"></div>`, out2.String(), "different secureID should not recover the value")
+}
diff --git a/modules/markup/internal/renderinternal.go b/modules/markup/internal/renderinternal.go
new file mode 100644
index 0000000000000..4775fecfc700c
--- /dev/null
+++ b/modules/markup/internal/renderinternal.go
@@ -0,0 +1,82 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package internal
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+	"html/template"
+	"io"
+	"regexp"
+	"strings"
+	"sync"
+
+	"code.gitea.io/gitea/modules/htmlutil"
+
+	"golang.org/x/net/html"
+)
+
+var reAttrClass = sync.OnceValue[*regexp.Regexp](func() *regexp.Regexp {
+	// TODO: it isn't a problem at the moment because our HTML contents are always well constructed
+	return regexp.MustCompile(`(<[^>]+)\s+class="([^"]+)"([^>]*>)`)
+})
+
+// RenderInternal also works without initialization
+// If no initialization (no secureID), it will not protect any attributes and return the original name&value
+type RenderInternal struct {
+	secureID       string
+	secureIDPrefix string
+}
+
+func (r *RenderInternal) Init(output io.Writer) io.WriteCloser {
+	buf := make([]byte, 12)
+	_, err := rand.Read(buf)
+	if err != nil {
+		panic("unable to generate secure id")
+	}
+	return r.init(base64.URLEncoding.EncodeToString(buf), output)
+}
+
+func (r *RenderInternal) init(secID string, output io.Writer) io.WriteCloser {
+	r.secureID = secID
+	r.secureIDPrefix = r.secureID + ":"
+	return &finalProcessor{renderInternal: r, output: output}
+}
+
+func (r *RenderInternal) RecoverProtectedValue(v string) (string, bool) {
+	if !strings.HasPrefix(v, r.secureIDPrefix) {
+		return "", false
+	}
+	return v[len(r.secureIDPrefix):], true
+}
+
+func (r *RenderInternal) SafeAttr(name string) string {
+	if r.secureID == "" {
+		return name
+	}
+	return "data-attr-" + name
+}
+
+func (r *RenderInternal) SafeValue(val string) string {
+	if r.secureID == "" {
+		return val
+	}
+	return r.secureID + ":" + val
+}
+
+func (r *RenderInternal) NodeSafeAttr(attr, val string) html.Attribute {
+	return html.Attribute{Key: r.SafeAttr(attr), Val: r.SafeValue(val)}
+}
+
+func (r *RenderInternal) ProtectSafeAttrs(content template.HTML) template.HTML {
+	if r.secureID == "" {
+		return content
+	}
+	return template.HTML(reAttrClass().ReplaceAllString(string(content), `$1 data-attr-class="`+r.secureIDPrefix+`$2"$3`))
+}
+
+func (r *RenderInternal) FormatWithSafeAttrs(w io.Writer, fmt string, a ...any) error {
+	_, err := w.Write([]byte(r.ProtectSafeAttrs(htmlutil.HTMLFormat(fmt, a...))))
+	return err
+}
diff --git a/modules/markup/markdown/ast.go b/modules/markup/markdown/ast.go
index 624c35d945371..ca165b1ba045f 100644
--- a/modules/markup/markdown/ast.go
+++ b/modules/markup/markdown/ast.go
@@ -34,13 +34,6 @@ func NewDetails() *Details {
 	}
 }
 
-// IsDetails returns true if the given node implements the Details interface,
-// otherwise false.
-func IsDetails(node ast.Node) bool {
-	_, ok := node.(*Details)
-	return ok
-}
-
 // Summary is a block that contains the summary of details block
 type Summary struct {
 	ast.BaseBlock
@@ -66,13 +59,6 @@ func NewSummary() *Summary {
 	}
 }
 
-// IsSummary returns true if the given node implements the Summary interface,
-// otherwise false.
-func IsSummary(node ast.Node) bool {
-	_, ok := node.(*Summary)
-	return ok
-}
-
 // TaskCheckBoxListItem is a block that represents a list item of a markdown block with a checkbox
 type TaskCheckBoxListItem struct {
 	*ast.ListItem
@@ -103,14 +89,7 @@ func NewTaskCheckBoxListItem(listItem *ast.ListItem) *TaskCheckBoxListItem {
 	}
 }
 
-// IsTaskCheckBoxListItem returns true if the given node implements the TaskCheckBoxListItem interface,
-// otherwise false.
-func IsTaskCheckBoxListItem(node ast.Node) bool {
-	_, ok := node.(*TaskCheckBoxListItem)
-	return ok
-}
-
-// Icon is an inline for a fomantic icon
+// Icon is an inline for a Fomantic UI icon
 type Icon struct {
 	ast.BaseInline
 	Name []byte
@@ -139,13 +118,6 @@ func NewIcon(name string) *Icon {
 	}
 }
 
-// IsIcon returns true if the given node implements the Icon interface,
-// otherwise false.
-func IsIcon(node ast.Node) bool {
-	_, ok := node.(*Icon)
-	return ok
-}
-
 // ColorPreview is an inline for a color preview
 type ColorPreview struct {
 	ast.BaseInline
diff --git a/modules/markup/markdown/goldmark.go b/modules/markup/markdown/goldmark.go
index c837b21e7804c..47dcfa8b5afc1 100644
--- a/modules/markup/markdown/goldmark.go
+++ b/modules/markup/markdown/goldmark.go
@@ -7,9 +7,11 @@ import (
 	"fmt"
 	"regexp"
 	"strings"
+	"sync"
 
 	"code.gitea.io/gitea/modules/container"
 	"code.gitea.io/gitea/modules/markup"
+	"code.gitea.io/gitea/modules/markup/internal"
 	"code.gitea.io/gitea/modules/setting"
 
 	"github.com/yuin/goldmark/ast"
@@ -23,11 +25,13 @@ import (
 
 // ASTTransformer is a default transformer of the goldmark tree.
 type ASTTransformer struct {
+	renderInternal *internal.RenderInternal
 	attentionTypes container.Set[string]
 }
 
-func NewASTTransformer() *ASTTransformer {
+func NewASTTransformer(renderInternal *internal.RenderInternal) *ASTTransformer {
 	return &ASTTransformer{
+		renderInternal: renderInternal,
 		attentionTypes: container.SetOf("note", "tip", "important", "warning", "caution"),
 	}
 }
@@ -109,12 +113,16 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
 	}
 }
 
-// NewHTMLRenderer creates a HTMLRenderer to render
-// in the gitea form.
-func NewHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
+// it is copied from old code, which is quite doubtful whether it is correct
+var reValidIconName = sync.OnceValue[*regexp.Regexp](func() *regexp.Regexp {
+	return regexp.MustCompile(`^[-\w]+$`) // old: regexp.MustCompile("^[a-z ]+$")
+})
+
+// NewHTMLRenderer creates a HTMLRenderer to render in the gitea form.
+func NewHTMLRenderer(renderInternal *internal.RenderInternal, opts ...html.Option) renderer.NodeRenderer {
 	r := &HTMLRenderer{
-		Config:      html.NewConfig(),
-		reValidName: regexp.MustCompile("^[a-z ]+$"),
+		renderInternal: renderInternal,
+		Config:         html.NewConfig(),
 	}
 	for _, opt := range opts {
 		opt.SetHTMLOption(&r.Config)
@@ -126,7 +134,7 @@ func NewHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
 // renders gitea specific features.
 type HTMLRenderer struct {
 	html.Config
-	reValidName *regexp.Regexp
+	renderInternal *internal.RenderInternal
 }
 
 // RegisterFuncs implements renderer.NodeRenderer.RegisterFuncs.
@@ -214,12 +222,13 @@ func (r *HTMLRenderer) renderIcon(w util.BufWriter, source []byte, node ast.Node
 		return ast.WalkContinue, nil
 	}
 
-	if !r.reValidName.MatchString(name) {
+	if !reValidIconName().MatchString(name) {
 		// skip this
 		return ast.WalkContinue, nil
 	}
 
-	_, err := w.WriteString(fmt.Sprintf(`<i class="icon %s"></i>`, name))
+	// FIXME: the "icon xxx" is from Fomantic UI, it's really questionable whether it still works correctly
+	err := r.renderInternal.FormatWithSafeAttrs(w, `<i class="icon %s"></i>`, name)
 	if err != nil {
 		return ast.WalkStop, err
 	}
diff --git a/modules/markup/markdown/markdown.go b/modules/markup/markdown/markdown.go
index 6af0deb27bb2b..a3915ad4398d3 100644
--- a/modules/markup/markdown/markdown.go
+++ b/modules/markup/markdown/markdown.go
@@ -9,7 +9,6 @@ import (
 	"html/template"
 	"io"
 	"strings"
-	"sync"
 
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/markup"
@@ -29,11 +28,6 @@ import (
 	"github.com/yuin/goldmark/util"
 )
 
-var (
-	specMarkdown     goldmark.Markdown
-	specMarkdownOnce sync.Once
-)
-
 var (
 	renderContextKey = parser.NewContextKey()
 	renderConfigKey  = parser.NewContextKey()
@@ -68,85 +62,95 @@ func newParserContext(ctx *markup.RenderContext) parser.Context {
 	return pc
 }
 
+type GlodmarkRender struct {
+	ctx *markup.RenderContext
+
+	goldmarkMarkdown goldmark.Markdown
+}
+
+func (r *GlodmarkRender) Convert(source []byte, writer io.Writer, opts ...parser.ParseOption) error {
+	return r.goldmarkMarkdown.Convert(source, writer, opts...)
+}
+
+func (r *GlodmarkRender) Renderer() renderer.Renderer {
+	return r.goldmarkMarkdown.Renderer()
+}
+
+func (r *GlodmarkRender) highlightingRenderer(w util.BufWriter, c highlighting.CodeBlockContext, entering bool) {
+	if entering {
+		language, _ := c.Language()
+		if language == nil {
+			language = []byte("text")
+		}
+
+		languageStr := string(language)
+
+		preClasses := []string{"code-block"}
+		if languageStr == "mermaid" || languageStr == "math" {
+			preClasses = append(preClasses, "is-loading")
+		}
+
+		err := r.ctx.RenderInternal.FormatWithSafeAttrs(w, `<pre class="%s">`, strings.Join(preClasses, " "))
+		if err != nil {
+			return
+		}
+
+		// include language-x class as part of commonmark spec
+		// the "display" class is used by "js/markup/math.js" to render the code element as a block
+		err = r.ctx.RenderInternal.FormatWithSafeAttrs(w, `<code class="chroma language-%s display">`, string(language))
+		if err != nil {
+			return
+		}
+	} else {
+		_, err := w.WriteString("</code></pre>")
+		if err != nil {
+			return
+		}
+	}
+}
+
 // SpecializedMarkdown sets up the Gitea specific markdown extensions
-func SpecializedMarkdown() goldmark.Markdown {
-	specMarkdownOnce.Do(func() {
-		specMarkdown = goldmark.New(
-			goldmark.WithExtensions(
-				extension.NewTable(
-					extension.WithTableCellAlignMethod(extension.TableCellAlignAttribute)),
-				extension.Strikethrough,
-				extension.TaskList,
-				extension.DefinitionList,
-				common.FootnoteExtension,
-				highlighting.NewHighlighting(
-					highlighting.WithFormatOptions(
-						chromahtml.WithClasses(true),
-						chromahtml.PreventSurroundingPre(true),
-					),
-					highlighting.WithWrapperRenderer(func(w util.BufWriter, c highlighting.CodeBlockContext, entering bool) {
-						if entering {
-							language, _ := c.Language()
-							if language == nil {
-								language = []byte("text")
-							}
-
-							languageStr := string(language)
-
-							preClasses := []string{"code-block"}
-							if languageStr == "mermaid" || languageStr == "math" {
-								preClasses = append(preClasses, "is-loading")
-							}
-
-							_, err := w.WriteString(`<pre class="` + strings.Join(preClasses, " ") + `">`)
-							if err != nil {
-								return
-							}
-
-							// include language-x class as part of commonmark spec
-							// the "display" class is used by "js/markup/math.js" to render the code element as a block
-							_, err = w.WriteString(`<code class="chroma language-` + string(language) + ` display">`)
-							if err != nil {
-								return
-							}
-						} else {
-							_, err := w.WriteString("</code></pre>")
-							if err != nil {
-								return
-							}
-						}
-					}),
-				),
-				math.NewExtension(
-					math.Enabled(setting.Markdown.EnableMath),
-				),
-				meta.Meta,
-			),
-			goldmark.WithParserOptions(
-				parser.WithAttribute(),
-				parser.WithAutoHeadingID(),
-				parser.WithASTTransformers(
-					util.Prioritized(NewASTTransformer(), 10000),
+func SpecializedMarkdown(ctx *markup.RenderContext) *GlodmarkRender {
+	// TODO: it could use a pool to cache the renderers to reuse them with different contexts
+	// at the moment it is fast enough (see the benchmarks)
+	r := &GlodmarkRender{ctx: ctx}
+	r.goldmarkMarkdown = goldmark.New(
+		goldmark.WithExtensions(
+			extension.NewTable(extension.WithTableCellAlignMethod(extension.TableCellAlignAttribute)),
+			extension.Strikethrough,
+			extension.TaskList,
+			extension.DefinitionList,
+			common.FootnoteExtension,
+			highlighting.NewHighlighting(
+				highlighting.WithFormatOptions(
+					chromahtml.WithClasses(true),
+					chromahtml.PreventSurroundingPre(true),
 				),
+				highlighting.WithWrapperRenderer(r.highlightingRenderer),
 			),
-			goldmark.WithRendererOptions(
-				html.WithUnsafe(),
-			),
-		)
-
-		// Override the original Tasklist renderer!
-		specMarkdown.Renderer().AddOptions(
-			renderer.WithNodeRenderers(
-				util.Prioritized(NewHTMLRenderer(), 10),
-			),
-		)
-	})
-	return specMarkdown
+			math.NewExtension(&ctx.RenderInternal, math.Enabled(setting.Markdown.EnableMath)),
+			meta.Meta,
+		),
+		goldmark.WithParserOptions(
+			parser.WithAttribute(),
+			parser.WithAutoHeadingID(),
+			parser.WithASTTransformers(util.Prioritized(NewASTTransformer(&ctx.RenderInternal), 10000)),
+		),
+		goldmark.WithRendererOptions(html.WithUnsafe()),
+	)
+
+	// Override the original Tasklist renderer!
+	r.goldmarkMarkdown.Renderer().AddOptions(
+		renderer.WithNodeRenderers(util.Prioritized(NewHTMLRenderer(&ctx.RenderInternal), 10)),
+	)
+
+	return r
 }
 
-// actualRender renders Markdown to HTML without handling special links.
-func actualRender(ctx *markup.RenderContext, input io.Reader, output io.Writer) error {
-	converter := SpecializedMarkdown()
+// render calls goldmark render to convert Markdown to HTML
+// NOTE: The output of this method MUST get sanitized separately!!!
+func render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error {
+	converter := SpecializedMarkdown(ctx)
 	lw := &limitWriter{
 		w:     output,
 		limit: setting.UI.MaxDisplayFileSize * 3,
@@ -160,8 +164,8 @@ func actualRender(ctx *markup.RenderContext, input io.Reader, output io.Writer)
 		}
 
 		log.Warn("Unable to render markdown due to panic in goldmark: %v", err)
-		if log.IsDebug() {
-			log.Debug("Panic in markdown: %v\n%s", err, log.Stack(2))
+		if (!setting.IsProd && !setting.IsInTesting) || log.IsDebug() {
+			log.Error("Panic in markdown: %v\n%s", err, log.Stack(2))
 		}
 	}()
 
@@ -200,26 +204,6 @@ func actualRender(ctx *markup.RenderContext, input io.Reader, output io.Writer)
 	return nil
 }
 
-// Note: The output of this method must get sanitized.
-func render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error {
-	defer func() {
-		err := recover()
-		if err == nil {
-			return
-		}
-
-		log.Warn("Unable to render markdown due to panic in goldmark - will return raw bytes")
-		if log.IsDebug() {
-			log.Debug("Panic in markdown: %v\n%s", err, log.Stack(2))
-		}
-		_, err = io.Copy(output, input)
-		if err != nil {
-			log.Error("io.Copy failed: %v", err)
-		}
-	}()
-	return actualRender(ctx, input, output)
-}
-
 // MarkupName describes markup's name
 var MarkupName = "markdown"
 
diff --git a/modules/markup/markdown/markdown_test.go b/modules/markup/markdown/markdown_test.go
index 780df8727f0c8..e4889a75e59fd 100644
--- a/modules/markup/markdown/markdown_test.go
+++ b/modules/markup/markdown/markdown_test.go
@@ -1051,3 +1051,17 @@ func TestAttention(t *testing.T) {
 	// legacy GitHub style
 	test(`> **warning**`, renderAttention("warning", "octicon-alert")+"\n</blockquote>")
 }
+
+func BenchmarkSpecializedMarkdown(b *testing.B) {
+	// 240856	      4719 ns/op
+	for i := 0; i < b.N; i++ {
+		markdown.SpecializedMarkdown(&markup.RenderContext{})
+	}
+}
+
+func BenchmarkMarkdownRender(b *testing.B) {
+	// 23202	     50840 ns/op
+	for i := 0; i < b.N; i++ {
+		_, _ = markdown.RenderString(&markup.RenderContext{Ctx: context.Background()}, "https://example.com\n- a\n- b\n")
+	}
+}
diff --git a/modules/markup/markdown/math/block_renderer.go b/modules/markup/markdown/math/block_renderer.go
index 84817ef1e4a51..0d2a966102e95 100644
--- a/modules/markup/markdown/math/block_renderer.go
+++ b/modules/markup/markdown/math/block_renderer.go
@@ -4,17 +4,21 @@
 package math
 
 import (
+	"code.gitea.io/gitea/modules/markup/internal"
+
 	gast "github.com/yuin/goldmark/ast"
 	"github.com/yuin/goldmark/renderer"
 	"github.com/yuin/goldmark/util"
 )
 
 // BlockRenderer represents a renderer for math Blocks
-type BlockRenderer struct{}
+type BlockRenderer struct {
+	renderInternal *internal.RenderInternal
+}
 
 // NewBlockRenderer creates a new renderer for math Blocks
-func NewBlockRenderer() renderer.NodeRenderer {
-	return &BlockRenderer{}
+func NewBlockRenderer(renderInternal *internal.RenderInternal) renderer.NodeRenderer {
+	return &BlockRenderer{renderInternal: renderInternal}
 }
 
 // RegisterFuncs registers the renderer for math Blocks
@@ -33,7 +37,7 @@ func (r *BlockRenderer) writeLines(w util.BufWriter, source []byte, n gast.Node)
 func (r *BlockRenderer) renderBlock(w util.BufWriter, source []byte, node gast.Node, entering bool) (gast.WalkStatus, error) {
 	n := node.(*Block)
 	if entering {
-		_, _ = w.WriteString(`<pre class="code-block is-loading"><code class="chroma language-math display">`)
+		_ = r.renderInternal.FormatWithSafeAttrs(w, `<pre class="code-block is-loading"><code class="chroma language-math display">`)
 		r.writeLines(w, source, n)
 	} else {
 		_, _ = w.WriteString(`</code></pre>` + "\n")
diff --git a/modules/markup/markdown/math/inline_renderer.go b/modules/markup/markdown/math/inline_renderer.go
index 96848099cce23..0cff4f1e74e11 100644
--- a/modules/markup/markdown/math/inline_renderer.go
+++ b/modules/markup/markdown/math/inline_renderer.go
@@ -6,17 +6,21 @@ package math
 import (
 	"bytes"
 
+	"code.gitea.io/gitea/modules/markup/internal"
+
 	"github.com/yuin/goldmark/ast"
 	"github.com/yuin/goldmark/renderer"
 	"github.com/yuin/goldmark/util"
 )
 
 // InlineRenderer is an inline renderer
-type InlineRenderer struct{}
+type InlineRenderer struct {
+	renderInternal *internal.RenderInternal
+}
 
 // NewInlineRenderer returns a new renderer for inline math
-func NewInlineRenderer() renderer.NodeRenderer {
-	return &InlineRenderer{}
+func NewInlineRenderer(renderInternal *internal.RenderInternal) renderer.NodeRenderer {
+	return &InlineRenderer{renderInternal: renderInternal}
 }
 
 func (r *InlineRenderer) renderInline(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
@@ -25,7 +29,7 @@ func (r *InlineRenderer) renderInline(w util.BufWriter, source []byte, n ast.Nod
 		if _, ok := n.(*InlineBlock); ok {
 			extraClass = "display "
 		}
-		_, _ = w.WriteString(`<code class="language-math ` + extraClass + `is-loading">`)
+		_ = r.renderInternal.FormatWithSafeAttrs(w, `<code class="language-math %sis-loading">`, extraClass)
 		for c := n.FirstChild(); c != nil; c = c.NextSibling() {
 			segment := c.(*ast.Text).Segment
 			value := util.EscapeHTML(segment.Value(source))
diff --git a/modules/markup/markdown/math/math.go b/modules/markup/markdown/math/math.go
index 3d9f376bc60e4..7e8defcd4a1e7 100644
--- a/modules/markup/markdown/math/math.go
+++ b/modules/markup/markdown/math/math.go
@@ -4,6 +4,8 @@
 package math
 
 import (
+	"code.gitea.io/gitea/modules/markup/internal"
+
 	"github.com/yuin/goldmark"
 	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/renderer"
@@ -12,6 +14,7 @@ import (
 
 // Extension is a math extension
 type Extension struct {
+	renderInternal    *internal.RenderInternal
 	enabled           bool
 	parseDollarInline bool
 	parseDollarBlock  bool
@@ -39,38 +42,10 @@ func Enabled(enable ...bool) Option {
 	})
 }
 
-// WithInlineDollarParser enables or disables the parsing of $...$
-func WithInlineDollarParser(enable ...bool) Option {
-	value := true
-	if len(enable) > 0 {
-		value = enable[0]
-	}
-	return extensionFunc(func(e *Extension) {
-		e.parseDollarInline = value
-	})
-}
-
-// WithBlockDollarParser enables or disables the parsing of $$...$$
-func WithBlockDollarParser(enable ...bool) Option {
-	value := true
-	if len(enable) > 0 {
-		value = enable[0]
-	}
-	return extensionFunc(func(e *Extension) {
-		e.parseDollarBlock = value
-	})
-}
-
-// Math represents a math extension with default rendered delimiters
-var Math = &Extension{
-	enabled:           true,
-	parseDollarBlock:  true,
-	parseDollarInline: true,
-}
-
 // NewExtension creates a new math extension with the provided options
-func NewExtension(opts ...Option) *Extension {
+func NewExtension(renderInternal *internal.RenderInternal, opts ...Option) *Extension {
 	r := &Extension{
+		renderInternal:    renderInternal,
 		enabled:           true,
 		parseDollarBlock:  true,
 		parseDollarInline: true,
@@ -102,7 +77,7 @@ func (e *Extension) Extend(m goldmark.Markdown) {
 	m.Parser().AddOptions(parser.WithInlineParsers(inlines...))
 
 	m.Renderer().AddOptions(renderer.WithNodeRenderers(
-		util.Prioritized(NewBlockRenderer(), 501),
-		util.Prioritized(NewInlineRenderer(), 502),
+		util.Prioritized(NewBlockRenderer(e.renderInternal), 501),
+		util.Prioritized(NewInlineRenderer(e.renderInternal), 502),
 	))
 }
diff --git a/modules/markup/markdown/meta_test.go b/modules/markup/markdown/meta_test.go
index 6949966328c4b..278c33f1d2f07 100644
--- a/modules/markup/markdown/meta_test.go
+++ b/modules/markup/markdown/meta_test.go
@@ -11,10 +11,8 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-/*
-IssueTemplate is a legacy to keep the unit tests working.
-Copied from structs.IssueTemplate, the original type has been changed a lot to support yaml template.
-*/
+// IssueTemplate is a legacy to keep the unit tests working.
+// Copied from structs.IssueTemplate, the original type has been changed a lot to support yaml template.
 type IssueTemplate struct {
 	Name   string   `json:"name" yaml:"name"`
 	Title  string   `json:"title" yaml:"title"`
diff --git a/modules/markup/markdown/transform_blockquote.go b/modules/markup/markdown/transform_blockquote.go
index 92dc500e69625..2651d44a69ff9 100644
--- a/modules/markup/markdown/transform_blockquote.go
+++ b/modules/markup/markdown/transform_blockquote.go
@@ -32,7 +32,8 @@ func (r *HTMLRenderer) renderAttention(w util.BufWriter, source []byte, node ast
 		default: // including "note"
 			octiconName = "info"
 		}
-		_, _ = w.WriteString(string(svg.RenderHTML("octicon-"+octiconName, 16, "attention-icon attention-"+n.AttentionType)))
+		svgHTML := svg.RenderHTML("octicon-"+octiconName, 16, "attention-icon attention-"+n.AttentionType)
+		_, _ = w.WriteString(string(r.renderInternal.ProtectSafeAttrs(svgHTML)))
 	}
 	return ast.WalkContinue, nil
 }
@@ -128,13 +129,13 @@ func (g *ASTTransformer) transformBlockquote(v *ast.Blockquote, reader text.Read
 	}
 
 	// color the blockquote
-	v.SetAttributeString("class", []byte("attention-header attention-"+attentionType))
+	v.SetAttributeString(g.renderInternal.SafeAttr("class"), []byte(g.renderInternal.SafeValue("attention-header attention-"+attentionType)))
 
 	// create an emphasis to make it bold
 	attentionParagraph := ast.NewParagraph()
 	g.applyElementDir(attentionParagraph)
 	emphasis := ast.NewEmphasis(2)
-	emphasis.SetAttributeString("class", []byte("attention-"+attentionType))
+	emphasis.SetAttributeString(g.renderInternal.SafeAttr("class"), []byte(g.renderInternal.SafeValue("attention-"+attentionType)))
 
 	attentionAstString := ast.NewString([]byte(cases.Title(language.English).String(attentionType)))
 
diff --git a/modules/markup/markdown/transform_codespan.go b/modules/markup/markdown/transform_codespan.go
index ff7d24eec97c9..bccc43aad2510 100644
--- a/modules/markup/markdown/transform_codespan.go
+++ b/modules/markup/markdown/transform_codespan.go
@@ -5,7 +5,6 @@ package markdown
 
 import (
 	"bytes"
-	"fmt"
 	"strings"
 
 	"code.gitea.io/gitea/modules/markup"
@@ -40,7 +39,7 @@ func (r *HTMLRenderer) renderCodeSpan(w util.BufWriter, source []byte, n ast.Nod
 					r.Writer.RawWrite(w, value)
 				}
 			case *ColorPreview:
-				_, _ = w.WriteString(fmt.Sprintf(`<span class="color-preview" style="background-color: %v"></span>`, string(v.Color)))
+				_ = r.renderInternal.FormatWithSafeAttrs(w, `<span class="color-preview" style="background-color: %s"></span>`, string(v.Color))
 			}
 		}
 		return ast.WalkSkipChildren, nil
diff --git a/modules/markup/markdown/transform_list.go b/modules/markup/markdown/transform_list.go
index b982fd4a8306a..c89ad2f2cf34b 100644
--- a/modules/markup/markdown/transform_list.go
+++ b/modules/markup/markdown/transform_list.go
@@ -72,7 +72,7 @@ func (g *ASTTransformer) transformList(_ *markup.RenderContext, v *ast.List, rc
 			}
 			newChild := NewTaskCheckBoxListItem(listItem)
 			newChild.IsChecked = taskCheckBox.IsChecked
-			newChild.SetAttributeString("class", []byte("task-list-item"))
+			newChild.SetAttributeString(g.renderInternal.SafeAttr("class"), []byte(g.renderInternal.SafeValue("task-list-item")))
 			segments := newChild.FirstChild().Lines()
 			if segments.Len() > 0 {
 				segment := segments.At(0)
diff --git a/modules/markup/render.go b/modules/markup/render.go
index 1977dc73f55ef..f05cb62626451 100644
--- a/modules/markup/render.go
+++ b/modules/markup/render.go
@@ -9,14 +9,15 @@ import (
 	"io"
 	"net/url"
 	"strings"
-	"sync"
 
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/gitrepo"
+	"code.gitea.io/gitea/modules/markup/internal"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
 
 	"github.com/yuin/goldmark/ast"
+	"golang.org/x/sync/errgroup"
 )
 
 type RenderMetaMode string
@@ -65,6 +66,8 @@ type RenderContext struct {
 	SidebarTocNode   ast.Node
 	RenderMetaAs     RenderMetaMode
 	InStandalonePage bool // used by external render. the router "/org/repo/render/..." will output the rendered content in a standalone page
+
+	RenderInternal internal.RenderInternal
 }
 
 // Cancel runs any cleanup functions that have been registered for this Ctx
@@ -156,59 +159,53 @@ sandbox="allow-scripts"
 	return err
 }
 
-func render(ctx *RenderContext, renderer Renderer, input io.Reader, output io.Writer) error {
-	var wg sync.WaitGroup
-	var err error
+func pipes() (io.ReadCloser, io.WriteCloser, func()) {
 	pr, pw := io.Pipe()
-	defer func() {
+	return pr, pw, func() {
 		_ = pr.Close()
 		_ = pw.Close()
-	}()
-
-	var pr2 io.ReadCloser
-	var pw2 io.WriteCloser
-
-	var sanitizerDisabled bool
-	if r, ok := renderer.(ExternalRenderer); ok {
-		sanitizerDisabled = r.SanitizerDisabled()
 	}
+}
 
-	if !sanitizerDisabled {
-		pr2, pw2 = io.Pipe()
-		defer func() {
-			_ = pr2.Close()
-			_ = pw2.Close()
-		}()
-
-		wg.Add(1)
-		go func() {
-			err = SanitizeReader(pr2, renderer.Name(), output)
-			_ = pr2.Close()
-			wg.Done()
-		}()
-	} else {
-		pw2 = util.NopCloser{Writer: output}
+func render(ctx *RenderContext, renderer Renderer, input io.Reader, output io.Writer) error {
+	finalProcessor := ctx.RenderInternal.Init(output)
+	defer finalProcessor.Close()
+
+	// input -> (pw1=pr1) -> renderer -> (pw2=pr2) -> SanitizeReader -> finalProcessor -> output
+	// no sanitizer: input -> (pw1=pr1) -> renderer -> pw2(finalProcessor) -> output
+	pr1, pw1, close1 := pipes()
+	defer close1()
+
+	eg, _ := errgroup.WithContext(ctx.Ctx)
+	var pw2 io.WriteCloser = util.NopCloser{Writer: finalProcessor}
+
+	if r, ok := renderer.(ExternalRenderer); !ok || !r.SanitizerDisabled() {
+		var pr2 io.ReadCloser
+		var close2 func()
+		pr2, pw2, close2 = pipes()
+		defer close2()
+		eg.Go(func() error {
+			defer pr2.Close()
+			return SanitizeReader(pr2, renderer.Name(), finalProcessor)
+		})
 	}
 
-	wg.Add(1)
-	go func() {
+	eg.Go(func() (err error) {
 		if r, ok := renderer.(PostProcessRenderer); ok && r.NeedPostProcess() {
-			err = PostProcess(ctx, pr, pw2)
+			err = PostProcess(ctx, pr1, pw2)
 		} else {
-			_, err = io.Copy(pw2, pr)
+			_, err = io.Copy(pw2, pr1)
 		}
-		_ = pr.Close()
-		_ = pw2.Close()
-		wg.Done()
-	}()
+		_, _ = pr1.Close(), pw2.Close()
+		return err
+	})
 
-	if err1 := renderer.Render(ctx, input, pw); err1 != nil {
-		return err1
+	if err := renderer.Render(ctx, input, pw1); err != nil {
+		return err
 	}
-	_ = pw.Close()
+	_ = pw1.Close()
 
-	wg.Wait()
-	return err
+	return eg.Wait()
 }
 
 // Init initializes the render global variables
diff --git a/modules/markup/sanitizer_custom.go b/modules/markup/sanitizer_custom.go
index 7978973166f6f..7f96556fd7954 100644
--- a/modules/markup/sanitizer_custom.go
+++ b/modules/markup/sanitizer_custom.go
@@ -4,6 +4,9 @@
 package markup
 
 import (
+	"regexp"
+	"strings"
+
 	"code.gitea.io/gitea/modules/setting"
 
 	"github.com/microcosm-cc/bluemonday"
@@ -15,8 +18,11 @@ func (st *Sanitizer) addSanitizerRules(policy *bluemonday.Policy, rules []settin
 			policy.AllowDataURIImages()
 		}
 		if rule.Element != "" {
-			if rule.Regexp != nil {
-				policy.AllowAttrs(rule.AllowAttr).Matching(rule.Regexp).OnElements(rule.Element)
+			if rule.Regexp != "" {
+				if !strings.HasPrefix(rule.Regexp, "^") || !strings.HasSuffix(rule.Regexp, "$") {
+					panic("Markup sanitizer rule regexp must start with ^ and end with $ to be strict")
+				}
+				policy.AllowAttrs(rule.AllowAttr).Matching(regexp.MustCompile(rule.Regexp)).OnElements(rule.Element)
 			} else {
 				policy.AllowAttrs(rule.AllowAttr).OnElements(rule.Element)
 			}
diff --git a/modules/markup/sanitizer_default.go b/modules/markup/sanitizer_default.go
index 476ae5e26f0c1..0fa54efd45ef9 100644
--- a/modules/markup/sanitizer_default.go
+++ b/modules/markup/sanitizer_default.go
@@ -16,36 +16,11 @@ import (
 func (st *Sanitizer) createDefaultPolicy() *bluemonday.Policy {
 	policy := bluemonday.UGCPolicy()
 
-	// For JS code copy and Mermaid loading state
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-block( is-loading)?$`)).OnElements("pre")
-
-	// For code preview
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-preview-[-\w]+( file-content)?$`)).Globally()
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-num$`)).OnElements("td")
-	policy.AllowAttrs("data-line-number").OnElements("span")
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-code chroma$`)).OnElements("td")
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-inner$`)).OnElements("div")
-
-	// For code preview (unicode escape)
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^file-view( unicode-escaped)?$`)).OnElements("table")
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-escape$`)).OnElements("td")
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^toggle-escape-button btn interact-bg$`)).OnElements("a") // don't use button, button might submit a form
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(ambiguous-code-point|escaped-code-point|broken-code-point)$`)).OnElements("span")
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^char$`)).OnElements("span")
-	policy.AllowAttrs("data-tooltip-content", "data-escaped").OnElements("span")
-
-	// For color preview
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^color-preview$`)).OnElements("span")
-
-	// For attention
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-header attention-\w+$`)).OnElements("blockquote")
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-\w+$`)).OnElements("strong")
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-icon attention-\w+ svg octicon-[\w-]+$`)).OnElements("svg")
-	policy.AllowAttrs("viewBox", "width", "height", "aria-hidden").OnElements("svg")
-	policy.AllowAttrs("fill-rule", "d").OnElements("path")
+	// NOTICE: DO NOT add special "class" regexp rules here anymore, use RenderInternal.SafeAttr instead
 
-	// For Chroma markdown plugin
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(chroma )?language-[\w-]+( display)?( is-loading)?$`)).OnElements("code")
+	// General safe SVG attributes
+	policy.AllowAttrs("viewBox", "width", "height", "aria-hidden", "data-attr-class").OnElements("svg")
+	policy.AllowAttrs("fill-rule", "d").OnElements("path")
 
 	// Checkboxes
 	policy.AllowAttrs("type").Matching(regexp.MustCompile(`^checkbox$`)).OnElements("input")
@@ -66,28 +41,15 @@ func (st *Sanitizer) createDefaultPolicy() *bluemonday.Policy {
 		policy.AllowURLSchemeWithCustomPolicy("data", disallowScheme)
 	}
 
-	// Allow classes for anchors
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`ref-issue( ref-external-issue)?`)).OnElements("a")
-
-	// Allow classes for task lists
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`task-list-item`)).OnElements("li")
-
 	// Allow classes for org mode list item status.
 	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(unchecked|checked|indeterminate)$`)).OnElements("li")
 
-	// Allow icons
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^icon(\s+[\p{L}\p{N}_-]+)+$`)).OnElements("i")
-
-	// Allow classes for emojis
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`emoji`)).OnElements("img")
-
-	// Allow icons, emojis, chroma syntax and keyword markup on span
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`^((icon(\s+[\p{L}\p{N}_-]+)+)|(emoji)|(language-math display)|(language-math inline))$|^([a-z][a-z0-9]{0,2})$|^` + keywordClass + `$`)).OnElements("span")
-
 	// Allow 'color' and 'background-color' properties for the style attribute on text elements.
 	policy.AllowStyles("color", "background-color").OnElements("span", "p")
 
-	// Allow generally safe attributes
+	policy.AllowAttrs("src", "autoplay", "controls").OnElements("video")
+
+	// Allow generally safe attributes (reference: https://github.com/jch/html-pipeline)
 	generalSafeAttrs := []string{
 		"abbr", "accept", "accept-charset",
 		"accesskey", "action", "align", "alt",
@@ -106,10 +68,9 @@ func (st *Sanitizer) createDefaultPolicy() *bluemonday.Policy {
 		"selected", "shape", "size", "span",
 		"start", "summary", "tabindex", "target",
 		"title", "type", "usemap", "valign", "value",
-		"vspace", "width", "itemprop",
-		"data-markdown-generated-content",
+		"vspace", "width", "itemprop", "itemscope", "itemtype",
+		"data-markdown-generated-content", "data-attr-class",
 	}
-
 	generalSafeElements := []string{
 		"h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8", "br", "b", "i", "strong", "em", "a", "pre", "code", "img", "tt",
 		"div", "ins", "del", "sup", "sub", "p", "ol", "ul", "table", "thead", "tbody", "tfoot", "blockquote", "label",
@@ -117,14 +78,8 @@ func (st *Sanitizer) createDefaultPolicy() *bluemonday.Policy {
 		"details", "caption", "figure", "figcaption",
 		"abbr", "bdo", "cite", "dfn", "mark", "small", "span", "time", "video", "wbr",
 	}
-
-	policy.AllowAttrs(generalSafeAttrs...).OnElements(generalSafeElements...)
-
-	policy.AllowAttrs("src", "autoplay", "controls").OnElements("video")
-
-	policy.AllowAttrs("itemscope", "itemtype").OnElements("div")
-
 	// FIXME: Need to handle longdesc in img but there is no easy way to do it
+	policy.AllowAttrs(generalSafeAttrs...).OnElements(generalSafeElements...)
 
 	// Custom keyword markup
 	defaultSanitizer.addSanitizerRules(policy, setting.ExternalSanitizerRules)
diff --git a/modules/markup/sanitizer_default_test.go b/modules/markup/sanitizer_default_test.go
index 20370509c134f..c5c43695ea08a 100644
--- a/modules/markup/sanitizer_default_test.go
+++ b/modules/markup/sanitizer_default_test.go
@@ -19,7 +19,6 @@ func TestSanitizer(t *testing.T) {
 		// Code highlighting class
 		`<code class="random string"></code>`, `<code></code>`,
 		`<code class="language-random ui tab active menu attached animating sidebar following bar center"></code>`, `<code></code>`,
-		`<code class="language-go"></code>`, `<code class="language-go"></code>`,
 
 		// Input checkbox
 		`<input type="hidden">`, ``,
@@ -38,10 +37,8 @@ func TestSanitizer(t *testing.T) {
 		// <kbd> tags
 		`<kbd>Ctrl + C</kbd>`, `<kbd>Ctrl + C</kbd>`,
 		`<i class="dropdown icon">NAUGHTY</i>`, `<i>NAUGHTY</i>`,
-		`<i class="icon dropdown"></i>`, `<i class="icon dropdown"></i>`,
 		`<input type="checkbox" disabled=""/>unchecked`, `<input type="checkbox" disabled=""/>unchecked`,
 		`<span class="emoji dropdown">NAUGHTY</span>`, `<span>NAUGHTY</span>`,
-		`<span class="emoji">contents</span>`, `<span class="emoji">contents</span>`,
 
 		// Color property
 		`<span style="color: red">Hello World</span>`, `<span style="color: red">Hello World</span>`,
diff --git a/modules/setting/markup.go b/modules/setting/markup.go
index 6c2246342be8e..dfce8afa77f82 100644
--- a/modules/setting/markup.go
+++ b/modules/setting/markup.go
@@ -54,7 +54,7 @@ type MarkupRenderer struct {
 type MarkupSanitizerRule struct {
 	Element            string
 	AllowAttr          string
-	Regexp             *regexp.Regexp
+	Regexp             string
 	AllowDataURIImages bool
 }
 
@@ -117,15 +117,24 @@ func createMarkupSanitizerRule(name string, sec ConfigSection) (MarkupSanitizerR
 
 		regexpStr := sec.Key("REGEXP").Value()
 		if regexpStr != "" {
-			// Validate when parsing the config that this is a valid regular
-			// expression. Then we can use regexp.MustCompile(...) later.
-			compiled, err := regexp.Compile(regexpStr)
+			hasPrefix := strings.HasPrefix(regexpStr, "^")
+			hasSuffix := strings.HasSuffix(regexpStr, "$")
+			if !hasPrefix || !hasSuffix {
+				log.Error("In markup.%s: REGEXP must start with ^ and end with $ to be strict", name)
+				// to avoid breaking existing user configurations and satisfy the strict requirement in addSanitizerRules
+				if !hasPrefix {
+					regexpStr = "^.*" + regexpStr
+				}
+				if !hasSuffix {
+					regexpStr += ".*$"
+				}
+			}
+			_, err := regexp.Compile(regexpStr)
 			if err != nil {
 				log.Error("In markup.%s: REGEXP (%s) failed to compile: %v", name, regexpStr, err)
 				return rule, false
 			}
-
-			rule.Regexp = compiled
+			rule.Regexp = regexpStr
 		}
 
 		ok = true
diff --git a/modules/svg/svg.go b/modules/svg/svg.go
index 8132978caca99..fded9d0873744 100644
--- a/modules/svg/svg.go
+++ b/modules/svg/svg.go
@@ -9,7 +9,7 @@ import (
 	"path"
 	"strings"
 
-	gitea_html "code.gitea.io/gitea/modules/html"
+	gitea_html "code.gitea.io/gitea/modules/htmlutil"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/public"
 )
diff --git a/modules/templates/helper.go b/modules/templates/helper.go
index 3ef11772dc7d7..d5b32358da752 100644
--- a/modules/templates/helper.go
+++ b/modules/templates/helper.go
@@ -10,12 +10,12 @@ import (
 	"html/template"
 	"net/url"
 	"reflect"
-	"slices"
 	"strings"
 	"time"
 
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/htmlutil"
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/svg"
@@ -39,7 +39,7 @@ func NewFuncMap() template.FuncMap {
 		"Iif":          iif,
 		"Eval":         evalTokens,
 		"SafeHTML":     safeHTML,
-		"HTMLFormat":   HTMLFormat,
+		"HTMLFormat":   htmlutil.HTMLFormat,
 		"HTMLEscape":   htmlEscape,
 		"QueryEscape":  queryEscape,
 		"JSEscape":     jsEscapeSafe,
@@ -184,23 +184,6 @@ func NewFuncMap() template.FuncMap {
 	}
 }
 
-func HTMLFormat(s string, rawArgs ...any) template.HTML {
-	args := slices.Clone(rawArgs)
-	for i, v := range args {
-		switch v := v.(type) {
-		case nil, bool, int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, float32, float64, template.HTML:
-			// for most basic types (including template.HTML which is safe), just do nothing and use it
-		case string:
-			args[i] = template.HTMLEscapeString(v)
-		case fmt.Stringer:
-			args[i] = template.HTMLEscapeString(v.String())
-		default:
-			args[i] = template.HTMLEscapeString(fmt.Sprint(v))
-		}
-	}
-	return template.HTML(fmt.Sprintf(s, args...))
-}
-
 // safeHTML render raw as HTML
 func safeHTML(s any) template.HTML {
 	switch v := s.(type) {
diff --git a/modules/templates/helper_test.go b/modules/templates/helper_test.go
index b9fabb7016460..3e17e86c66256 100644
--- a/modules/templates/helper_test.go
+++ b/modules/templates/helper_test.go
@@ -61,10 +61,6 @@ func TestJSEscapeSafe(t *testing.T) {
 	assert.EqualValues(t, `\u0026\u003C\u003E\'\"`, jsEscapeSafe(`&<>'"`))
 }
 
-func TestHTMLFormat(t *testing.T) {
-	assert.Equal(t, template.HTML("<a>&lt; < 1</a>"), HTMLFormat("<a>%s %s %d</a>", "<", template.HTML("<"), 1))
-}
-
 func TestSanitizeHTML(t *testing.T) {
 	assert.Equal(t, template.HTML(`<a href="/" rel="nofollow">link</a> xss <div>inline</div>`), SanitizeHTML(`<a href="/">link</a> <a href="javascript:">xss</a> <div style="dangerous">inline</div>`))
 }
diff --git a/modules/templates/util_avatar.go b/modules/templates/util_avatar.go
index afc10915163bc..f7dd408ee2133 100644
--- a/modules/templates/util_avatar.go
+++ b/modules/templates/util_avatar.go
@@ -14,7 +14,7 @@ import (
 	"code.gitea.io/gitea/models/organization"
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
-	gitea_html "code.gitea.io/gitea/modules/html"
+	gitea_html "code.gitea.io/gitea/modules/htmlutil"
 	"code.gitea.io/gitea/modules/setting"
 )
 
diff --git a/modules/templates/util_render.go b/modules/templates/util_render.go
index 8e443446bd69c..5776eefced961 100644
--- a/modules/templates/util_render.go
+++ b/modules/templates/util_render.go
@@ -16,6 +16,7 @@ import (
 
 	issues_model "code.gitea.io/gitea/models/issues"
 	"code.gitea.io/gitea/modules/emoji"
+	"code.gitea.io/gitea/modules/htmlutil"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/markup/markdown"
@@ -140,7 +141,7 @@ func (ut *RenderUtils) RenderLabel(label *issues_model.Label) template.HTML {
 
 	if labelScope == "" {
 		// Regular label
-		return HTMLFormat(`<div class="ui label %s" style="color: %s !important; background-color: %s !important;" data-tooltip-content title="%s">%s</div>`,
+		return htmlutil.HTMLFormat(`<div class="ui label %s" style="color: %s !important; background-color: %s !important;" data-tooltip-content title="%s">%s</div>`,
 			extraCSSClasses, textColor, label.Color, descriptionText, ut.RenderEmoji(label.Name))
 	}
 
@@ -174,7 +175,7 @@ func (ut *RenderUtils) RenderLabel(label *issues_model.Label) template.HTML {
 	itemColor := "#" + hex.EncodeToString(itemBytes)
 	scopeColor := "#" + hex.EncodeToString(scopeBytes)
 
-	return HTMLFormat(`<span class="ui label %s scope-parent" data-tooltip-content title="%s">`+
+	return htmlutil.HTMLFormat(`<span class="ui label %s scope-parent" data-tooltip-content title="%s">`+
 		`<div class="ui label scope-left" style="color: %s !important; background-color: %s !important">%s</div>`+
 		`<div class="ui label scope-right" style="color: %s !important; background-color: %s !important">%s</div>`+
 		`</span>`,
diff --git a/modules/templates/util_render_test.go b/modules/templates/util_render_test.go
index 529507e7eab82..cf6d839cbf686 100644
--- a/modules/templates/util_render_test.go
+++ b/modules/templates/util_render_test.go
@@ -113,34 +113,34 @@ func TestRenderCommitBody(t *testing.T) {
 	}
 
 	expected := `/just/a/path.bin
-<a href="https://example.com/file.bin" class="link">https://example.com/file.bin</a>
+<a href="https://example.com/file.bin">https://example.com/file.bin</a>
 [local link](file.bin)
-[remote link](<a href="https://example.com" class="link">https://example.com</a>)
+[remote link](<a href="https://example.com">https://example.com</a>)
 [[local link|file.bin]]
-[[remote link|<a href="https://example.com" class="link">https://example.com</a>]]
+[[remote link|<a href="https://example.com">https://example.com</a>]]
 ![local image](image.jpg)
-![remote image](<a href="https://example.com/image.jpg" class="link">https://example.com/image.jpg</a>)
+![remote image](<a href="https://example.com/image.jpg">https://example.com/image.jpg</a>)
 [[local image|image.jpg]]
-[[remote link|<a href="https://example.com/image.jpg" class="link">https://example.com/image.jpg</a>]]
+[[remote link|<a href="https://example.com/image.jpg">https://example.com/image.jpg</a>]]
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" class="compare"><code class="nohighlight">88fc37a3c0...12fc37a3c0 (hash)</code></a>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" class="commit"><code class="nohighlight">88fc37a3c0</code></a>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
 <span class="emoji" aria-label="thumbs up">👍</span>
-<a href="mailto:mail@domain.com" class="mailto">mail@domain.com</a>
-<a href="/mention-user" class="mention">@mention-user</a> test
+<a href="mailto:mail@domain.com">mail@domain.com</a>
+<a href="/mention-user">@mention-user</a> test
 <a href="/user13/repo11/issues/123" class="ref-issue">#123</a>
   space`
 	assert.EqualValues(t, expected, string(newTestRenderUtils().RenderCommitBody(testInput(), testMetas)))
 }
 
 func TestRenderCommitMessage(t *testing.T) {
-	expected := `space <a href="/mention-user" data-markdown-generated-content="" class="mention">@mention-user</a>  `
+	expected := `space <a href="/mention-user" data-markdown-generated-content="">@mention-user</a>  `
 	assert.EqualValues(t, expected, newTestRenderUtils().RenderCommitMessage(testInput(), testMetas))
 }
 
 func TestRenderCommitMessageLinkSubject(t *testing.T) {
-	expected := `<a href="https://example.com/link" class="muted">space </a><a href="/mention-user" data-markdown-generated-content="" class="mention">@mention-user</a>`
+	expected := `<a href="https://example.com/link" class="muted">space </a><a href="/mention-user" data-markdown-generated-content="">@mention-user</a>`
 	assert.EqualValues(t, expected, newTestRenderUtils().RenderCommitMessageLinkSubject(testInput(), "https://example.com/link", testMetas))
 }
 
diff --git a/options/locale/locale_en-US.ini b/options/locale/locale_en-US.ini
index c3639fb72e2f3..122b70924a9ca 100644
--- a/options/locale/locale_en-US.ini
+++ b/options/locale/locale_en-US.ini
@@ -352,6 +352,7 @@ enable_update_checker = Enable Update Checker
 enable_update_checker_helper = Checks for new version releases periodically by connecting to gitea.io.
 env_config_keys = Environment Configuration
 env_config_keys_prompt = The following environment variables will also be applied to your configuration file:
+config_write_file_prompt = These configuration options will be written into:
 
 [home]
 nav_menu = Navigation Menu
diff --git a/routers/api/v1/repo/branch.go b/routers/api/v1/repo/branch.go
index bb16858c81160..1cea7d8c72e2e 100644
--- a/routers/api/v1/repo/branch.go
+++ b/routers/api/v1/repo/branch.go
@@ -133,11 +133,6 @@ func DeleteBranch(ctx *context.APIContext) {
 
 	branchName := ctx.PathParam("*")
 
-	if ctx.Repo.Repository.IsEmpty {
-		ctx.Error(http.StatusForbidden, "", "Git Repository is empty.")
-		return
-	}
-
 	// check whether branches of this repository has been synced
 	totalNumOfBranches, err := db.Count[git_model.Branch](ctx, git_model.FindBranchOptions{
 		RepoID:          ctx.Repo.Repository.ID,
diff --git a/routers/api/v1/repo/fork.go b/routers/api/v1/repo/fork.go
index a1e3c9804ba39..14a1a8d1c4a3d 100644
--- a/routers/api/v1/repo/fork.go
+++ b/routers/api/v1/repo/fork.go
@@ -55,11 +55,20 @@ func ListForks(ctx *context.APIContext) {
 	//   "404":
 	//     "$ref": "#/responses/notFound"
 
-	forks, err := repo_model.GetForks(ctx, ctx.Repo.Repository, utils.GetListOptions(ctx))
+	forks, total, err := repo_service.FindForks(ctx, ctx.Repo.Repository, ctx.Doer, utils.GetListOptions(ctx))
 	if err != nil {
-		ctx.Error(http.StatusInternalServerError, "GetForks", err)
+		ctx.Error(http.StatusInternalServerError, "FindForks", err)
 		return
 	}
+	if err := repo_model.RepositoryList(forks).LoadOwners(ctx); err != nil {
+		ctx.Error(http.StatusInternalServerError, "LoadOwners", err)
+		return
+	}
+	if err := repo_model.RepositoryList(forks).LoadUnits(ctx); err != nil {
+		ctx.Error(http.StatusInternalServerError, "LoadUnits", err)
+		return
+	}
+
 	apiForks := make([]*api.Repository, len(forks))
 	for i, fork := range forks {
 		permission, err := access_model.GetUserRepoPermission(ctx, fork, ctx.Doer)
@@ -70,7 +79,7 @@ func ListForks(ctx *context.APIContext) {
 		apiForks[i] = convert.ToRepo(ctx, fork, permission)
 	}
 
-	ctx.SetTotalCountHeader(int64(ctx.Repo.Repository.NumForks))
+	ctx.SetTotalCountHeader(total)
 	ctx.JSON(http.StatusOK, apiForks)
 }
 
diff --git a/routers/web/auth/oauth2_provider.go b/routers/web/auth/oauth2_provider.go
index faea34959fb5b..2ccc4a2253742 100644
--- a/routers/web/auth/oauth2_provider.go
+++ b/routers/web/auth/oauth2_provider.go
@@ -80,12 +80,12 @@ func (err errCallback) Error() string {
 }
 
 type userInfoResponse struct {
-	Sub      string   `json:"sub"`
-	Name     string   `json:"name"`
-	Username string   `json:"preferred_username"`
-	Email    string   `json:"email"`
-	Picture  string   `json:"picture"`
-	Groups   []string `json:"groups"`
+	Sub               string   `json:"sub"`
+	Name              string   `json:"name"`
+	PreferredUsername string   `json:"preferred_username"`
+	Email             string   `json:"email"`
+	Picture           string   `json:"picture"`
+	Groups            []string `json:"groups"`
 }
 
 // InfoOAuth manages request for userinfo endpoint
@@ -97,11 +97,11 @@ func InfoOAuth(ctx *context.Context) {
 	}
 
 	response := &userInfoResponse{
-		Sub:      fmt.Sprint(ctx.Doer.ID),
-		Name:     ctx.Doer.FullName,
-		Username: ctx.Doer.Name,
-		Email:    ctx.Doer.Email,
-		Picture:  ctx.Doer.AvatarLink(ctx),
+		Sub:               fmt.Sprint(ctx.Doer.ID),
+		Name:              ctx.Doer.DisplayName(),
+		PreferredUsername: ctx.Doer.Name,
+		Email:             ctx.Doer.Email,
+		Picture:           ctx.Doer.AvatarLink(ctx),
 	}
 
 	groups, err := oauth2_provider.GetOAuthGroupsForUser(ctx, ctx.Doer)
diff --git a/routers/web/auth/oauth_test.go b/routers/web/auth/oauth_test.go
index 78af97fa9c669..8d9365fab453e 100644
--- a/routers/web/auth/oauth_test.go
+++ b/routers/web/auth/oauth_test.go
@@ -10,7 +10,6 @@ import (
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
-	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/services/oauth2_provider"
 
 	"github.com/golang-jwt/jwt/v5"
@@ -66,25 +65,7 @@ func TestNewAccessTokenResponse_OIDCToken(t *testing.T) {
 
 	// Scopes: openid profile email
 	oidcToken = createAndParseToken(t, grants[0])
-	assert.Equal(t, user.Name, oidcToken.Name)
-	assert.Equal(t, user.Name, oidcToken.PreferredUsername)
-	assert.Equal(t, user.HTMLURL(), oidcToken.Profile)
-	assert.Equal(t, user.AvatarLink(db.DefaultContext), oidcToken.Picture)
-	assert.Equal(t, user.Website, oidcToken.Website)
-	assert.Equal(t, user.UpdatedUnix, oidcToken.UpdatedAt)
-	assert.Equal(t, user.Email, oidcToken.Email)
-	assert.Equal(t, user.IsActive, oidcToken.EmailVerified)
-
-	// set DefaultShowFullName to true
-	oldDefaultShowFullName := setting.UI.DefaultShowFullName
-	setting.UI.DefaultShowFullName = true
-	defer func() {
-		setting.UI.DefaultShowFullName = oldDefaultShowFullName
-	}()
-
-	// Scopes: openid profile email
-	oidcToken = createAndParseToken(t, grants[0])
-	assert.Equal(t, user.FullName, oidcToken.Name)
+	assert.Equal(t, user.DisplayName(), oidcToken.Name)
 	assert.Equal(t, user.Name, oidcToken.PreferredUsername)
 	assert.Equal(t, user.HTMLURL(), oidcToken.Profile)
 	assert.Equal(t, user.AvatarLink(db.DefaultContext), oidcToken.Picture)
diff --git a/routers/web/repo/setting/setting.go b/routers/web/repo/setting/setting.go
index 485bd927fa932..e30129bb44ccd 100644
--- a/routers/web/repo/setting/setting.go
+++ b/routers/web/repo/setting/setting.go
@@ -8,7 +8,6 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
-	"strconv"
 	"strings"
 	"time"
 
@@ -290,8 +289,8 @@ func SettingsPost(ctx *context.Context) {
 			return
 		}
 
-		m, err := selectPushMirrorByForm(ctx, form, repo)
-		if err != nil {
+		m, _, _ := repo_model.GetPushMirrorByIDAndRepoID(ctx, form.PushMirrorID, repo.ID)
+		if m == nil {
 			ctx.NotFound("", nil)
 			return
 		}
@@ -317,15 +316,13 @@ func SettingsPost(ctx *context.Context) {
 			return
 		}
 
-		id, err := strconv.ParseInt(form.PushMirrorID, 10, 64)
-		if err != nil {
-			ctx.ServerError("UpdatePushMirrorIntervalPushMirrorID", err)
+		m, _, _ := repo_model.GetPushMirrorByIDAndRepoID(ctx, form.PushMirrorID, repo.ID)
+		if m == nil {
+			ctx.NotFound("", nil)
 			return
 		}
-		m := &repo_model.PushMirror{
-			ID:       id,
-			Interval: interval,
-		}
+
+		m.Interval = interval
 		if err := repo_model.UpdatePushMirrorInterval(ctx, m); err != nil {
 			ctx.ServerError("UpdatePushMirrorInterval", err)
 			return
@@ -334,7 +331,10 @@ func SettingsPost(ctx *context.Context) {
 		// If we observed its implementation in the context of `push-mirror-sync` where it
 		// is evident that pushing to the queue is necessary for updates.
 		// So, there are updates within the given interval, it is necessary to update the queue accordingly.
-		mirror_service.AddPushMirrorToQueue(m.ID)
+		if !ctx.FormBool("push_mirror_defer_sync") {
+			// push_mirror_defer_sync is mainly for testing purpose, we do not really want to sync the push mirror immediately
+			mirror_service.AddPushMirrorToQueue(m.ID)
+		}
 		ctx.Flash.Success(ctx.Tr("repo.settings.update_settings_success"))
 		ctx.Redirect(repo.Link() + "/settings")
 
@@ -348,18 +348,18 @@ func SettingsPost(ctx *context.Context) {
 		// as an error on the UI for this action
 		ctx.Data["Err_RepoName"] = nil
 
-		m, err := selectPushMirrorByForm(ctx, form, repo)
-		if err != nil {
+		m, _, _ := repo_model.GetPushMirrorByIDAndRepoID(ctx, form.PushMirrorID, repo.ID)
+		if m == nil {
 			ctx.NotFound("", nil)
 			return
 		}
 
-		if err = mirror_service.RemovePushMirrorRemote(ctx, m); err != nil {
+		if err := mirror_service.RemovePushMirrorRemote(ctx, m); err != nil {
 			ctx.ServerError("RemovePushMirrorRemote", err)
 			return
 		}
 
-		if err = repo_model.DeletePushMirrors(ctx, repo_model.PushMirrorOptions{ID: m.ID, RepoID: m.RepoID}); err != nil {
+		if err := repo_model.DeletePushMirrors(ctx, repo_model.PushMirrorOptions{ID: m.ID, RepoID: m.RepoID}); err != nil {
 			ctx.ServerError("DeletePushMirrorByID", err)
 			return
 		}
@@ -995,24 +995,3 @@ func handleSettingRemoteAddrError(ctx *context.Context, err error, form *forms.R
 	}
 	ctx.RenderWithErr(ctx.Tr("repo.mirror_address_url_invalid"), tplSettingsOptions, form)
 }
-
-func selectPushMirrorByForm(ctx *context.Context, form *forms.RepoSettingForm, repo *repo_model.Repository) (*repo_model.PushMirror, error) {
-	id, err := strconv.ParseInt(form.PushMirrorID, 10, 64)
-	if err != nil {
-		return nil, err
-	}
-
-	pushMirrors, _, err := repo_model.GetPushMirrorsByRepoID(ctx, repo.ID, db.ListOptions{})
-	if err != nil {
-		return nil, err
-	}
-
-	for _, m := range pushMirrors {
-		if m.ID == id {
-			m.Repo = repo
-			return m, nil
-		}
-	}
-
-	return nil, fmt.Errorf("PushMirror[%v] not associated to repository %v", id, repo)
-}
diff --git a/routers/web/repo/view.go b/routers/web/repo/view.go
index 7030f6d8a982a..5d68ace29b535 100644
--- a/routers/web/repo/view.go
+++ b/routers/web/repo/view.go
@@ -1151,26 +1151,25 @@ func Forks(ctx *context.Context) {
 	if page <= 0 {
 		page = 1
 	}
+	pageSize := setting.ItemsPerPage
 
-	pager := context.NewPagination(ctx.Repo.Repository.NumForks, setting.ItemsPerPage, page, 5)
-	ctx.Data["Page"] = pager
-
-	forks, err := repo_model.GetForks(ctx, ctx.Repo.Repository, db.ListOptions{
-		Page:     pager.Paginater.Current(),
-		PageSize: setting.ItemsPerPage,
+	forks, total, err := repo_service.FindForks(ctx, ctx.Repo.Repository, ctx.Doer, db.ListOptions{
+		Page:     page,
+		PageSize: pageSize,
 	})
 	if err != nil {
-		ctx.ServerError("GetForks", err)
+		ctx.ServerError("FindForks", err)
 		return
 	}
 
-	for _, fork := range forks {
-		if err = fork.LoadOwner(ctx); err != nil {
-			ctx.ServerError("LoadOwner", err)
-			return
-		}
+	if err := repo_model.RepositoryList(forks).LoadOwners(ctx); err != nil {
+		ctx.ServerError("LoadAttributes", err)
+		return
 	}
 
+	pager := context.NewPagination(int(total), pageSize, page, 5)
+	ctx.Data["Page"] = pager
+
 	ctx.Data["Forks"] = forks
 
 	ctx.HTML(http.StatusOK, tplForks)
diff --git a/routers/web/repo/wiki.go b/routers/web/repo/wiki.go
index 13f6b69493e09..2732a67e714fd 100644
--- a/routers/web/repo/wiki.go
+++ b/routers/web/repo/wiki.go
@@ -326,7 +326,7 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 
 	if rctx.SidebarTocNode != nil {
 		sb := &strings.Builder{}
-		err = markdown.SpecializedMarkdown().Renderer().Render(sb, nil, rctx.SidebarTocNode)
+		err = markdown.SpecializedMarkdown(rctx).Renderer().Render(sb, nil, rctx.SidebarTocNode)
 		if err != nil {
 			log.Error("Failed to render wiki sidebar TOC: %v", err)
 		} else {
diff --git a/services/context/repo.go b/services/context/repo.go
index e7b32d62832d4..1eafb7ca48bb4 100644
--- a/services/context/repo.go
+++ b/services/context/repo.go
@@ -393,14 +393,7 @@ func repoAssignment(ctx *Context, repo *repo_model.Repository) {
 		}
 	}
 
-	pushMirrors, _, err := repo_model.GetPushMirrorsByRepoID(ctx, repo.ID, db.ListOptions{})
-	if err != nil {
-		ctx.ServerError("GetPushMirrorsByRepoID", err)
-		return
-	}
-
 	ctx.Repo.Repository = repo
-	ctx.Data["PushMirrors"] = pushMirrors
 	ctx.Data["RepoName"] = ctx.Repo.Repository.Name
 	ctx.Data["IsEmptyRepo"] = ctx.Repo.Repository.IsEmpty
 
diff --git a/services/forms/repo_form.go b/services/forms/repo_form.go
index d27bbca894811..8e663084f86e1 100644
--- a/services/forms/repo_form.go
+++ b/services/forms/repo_form.go
@@ -122,7 +122,7 @@ type RepoSettingForm struct {
 	MirrorPassword         string
 	LFS                    bool   `form:"mirror_lfs"`
 	LFSEndpoint            string `form:"mirror_lfs_endpoint"`
-	PushMirrorID           string
+	PushMirrorID           int64
 	PushMirrorAddress      string
 	PushMirrorUsername     string
 	PushMirrorPassword     string
diff --git a/services/mirror/mirror.go b/services/mirror/mirror.go
index 44218d6fb3f5d..e029bbb1d6353 100644
--- a/services/mirror/mirror.go
+++ b/services/mirror/mirror.go
@@ -8,7 +8,6 @@ import (
 	"fmt"
 
 	repo_model "code.gitea.io/gitea/models/repo"
-	"code.gitea.io/gitea/modules/graceful"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/queue"
 	"code.gitea.io/gitea/modules/setting"
@@ -119,14 +118,7 @@ func Update(ctx context.Context, pullLimit, pushLimit int) error {
 	return nil
 }
 
-func queueHandler(items ...*SyncRequest) []*SyncRequest {
-	for _, req := range items {
-		doMirrorSync(graceful.GetManager().ShutdownContext(), req)
-	}
-	return nil
-}
-
 // InitSyncMirrors initializes a go routine to sync the mirrors
 func InitSyncMirrors() {
-	StartSyncMirrors(queueHandler)
+	StartSyncMirrors()
 }
diff --git a/services/mirror/queue.go b/services/mirror/queue.go
index 0d9a624730daa..ca5e2c7272a50 100644
--- a/services/mirror/queue.go
+++ b/services/mirror/queue.go
@@ -28,12 +28,19 @@ type SyncRequest struct {
 	ReferenceID int64 // RepoID for pull mirror, MirrorID for push mirror
 }
 
+func queueHandler(items ...*SyncRequest) []*SyncRequest {
+	for _, req := range items {
+		doMirrorSync(graceful.GetManager().ShutdownContext(), req)
+	}
+	return nil
+}
+
 // StartSyncMirrors starts a go routine to sync the mirrors
-func StartSyncMirrors(queueHandle func(data ...*SyncRequest) []*SyncRequest) {
+func StartSyncMirrors() {
 	if !setting.Mirror.Enabled {
 		return
 	}
-	mirrorQueue = queue.CreateUniqueQueue(graceful.GetManager().ShutdownContext(), "mirror", queueHandle)
+	mirrorQueue = queue.CreateUniqueQueue(graceful.GetManager().ShutdownContext(), "mirror", queueHandler)
 	if mirrorQueue == nil {
 		log.Fatal("Unable to create mirror queue")
 	}
diff --git a/services/oauth2_provider/access_token.go b/services/oauth2_provider/access_token.go
index f79afa4b301ba..dd3f24eeef242 100644
--- a/services/oauth2_provider/access_token.go
+++ b/services/oauth2_provider/access_token.go
@@ -148,7 +148,7 @@ func NewAccessTokenResponse(ctx context.Context, grant *auth.OAuth2Grant, server
 			Nonce: grant.Nonce,
 		}
 		if grant.ScopeContains("profile") {
-			idToken.Name = user.GetDisplayName()
+			idToken.Name = user.DisplayName()
 			idToken.PreferredUsername = user.Name
 			idToken.Profile = user.HTMLURL()
 			idToken.Picture = user.AvatarLink(ctx)
diff --git a/services/repository/fork.go b/services/repository/fork.go
index 5b24015a0384f..bc4fdf85627b0 100644
--- a/services/repository/fork.go
+++ b/services/repository/fork.go
@@ -12,6 +12,7 @@ import (
 	"code.gitea.io/gitea/models/db"
 	git_model "code.gitea.io/gitea/models/git"
 	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/models/unit"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/gitrepo"
@@ -20,6 +21,8 @@ import (
 	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/util"
 	notify_service "code.gitea.io/gitea/services/notify"
+
+	"xorm.io/builder"
 )
 
 // ErrForkAlreadyExist represents a "ForkAlreadyExist" kind of error.
@@ -247,3 +250,24 @@ func ConvertForkToNormalRepository(ctx context.Context, repo *repo_model.Reposit
 
 	return err
 }
+
+type findForksOptions struct {
+	db.ListOptions
+	RepoID int64
+	Doer   *user_model.User
+}
+
+func (opts findForksOptions) ToConds() builder.Cond {
+	return builder.Eq{"fork_id": opts.RepoID}.And(
+		repo_model.AccessibleRepositoryCondition(opts.Doer, unit.TypeInvalid),
+	)
+}
+
+// FindForks returns all the forks of the repository
+func FindForks(ctx context.Context, repo *repo_model.Repository, doer *user_model.User, listOptions db.ListOptions) ([]*repo_model.Repository, int64, error) {
+	return db.FindAndCount[repo_model.Repository](ctx, findForksOptions{
+		ListOptions: listOptions,
+		RepoID:      repo.ID,
+		Doer:        doer,
+	})
+}
diff --git a/templates/admin/org/list.tmpl b/templates/admin/org/list.tmpl
index d0805c85bc9d1..d5e09939c5324 100644
--- a/templates/admin/org/list.tmpl
+++ b/templates/admin/org/list.tmpl
@@ -52,7 +52,7 @@
 						<tr>
 							<td>{{.ID}}</td>
 							<td>
-								<a href="{{.HomeLink}}">{{.Name}}</a>
+								<a href="{{.HomeLink}}">{{if and DefaultShowFullName .FullName}}{{.FullName}} ({{.Name}}){{else}}{{.Name}}{{end}}</a>
 								{{if .Visibility.IsPrivate}}
 									<span class="text gold">{{svg "octicon-lock"}}</span>
 								{{end}}
diff --git a/templates/install.tmpl b/templates/install.tmpl
index 5055031a9029c..ea4023d409098 100644
--- a/templates/install.tmpl
+++ b/templates/install.tmpl
@@ -338,7 +338,7 @@
 
 					<div class="inline field">
 						<div class="right-content">
-							These configuration options will be written into: {{.CustomConfFile}}
+							{{ctx.Locale.Tr "install.config_write_file_prompt"}} <span class="ui label">{{.CustomConfFile}}</span> <button class="btn interact-fg" data-clipboard-text="{{.CustomConfFile}}">{{svg "octicon-copy" 14}}</button>
 						</div>
 						<div class="tw-mt-4 tw-mb-2 tw-text-center">
 							<button class="ui primary button">{{ctx.Locale.Tr "install.install_btn_confirm"}}</button>
diff --git a/templates/repo/forks.tmpl b/templates/repo/forks.tmpl
index 412c59b60e84d..725b67c651cb1 100644
--- a/templates/repo/forks.tmpl
+++ b/templates/repo/forks.tmpl
@@ -5,12 +5,14 @@
 		<h2 class="ui dividing header">
 			{{ctx.Locale.Tr "repo.forks"}}
 		</h2>
+		<div class="flex-list">
 		{{range .Forks}}
-			<div class="tw-flex tw-items-center tw-py-2">
-				<span class="tw-mr-1">{{ctx.AvatarUtils.Avatar .Owner}}</span>
-				<a href="{{.Owner.HomeLink}}">{{.Owner.Name}}</a> / <a href="{{.Link}}">{{.Name}}</a>
+			<div class="flex-item tw-border-0 repo-fork-item">
+				<span>{{ctx.AvatarUtils.Avatar .Owner}}</span>
+				<span><a href="{{.Owner.HomeLink}}">{{.Owner.Name}}</a> / <a href="{{.Link}}">{{.Name}}</a></span>
 			</div>
 		{{end}}
+		</div>
 	</div>
 
 	{{template "base/paginate" .}}
diff --git a/templates/user/dashboard/repolist.tmpl b/templates/user/dashboard/repolist.tmpl
index be710675d560a..a2764ba608442 100644
--- a/templates/user/dashboard/repolist.tmpl
+++ b/templates/user/dashboard/repolist.tmpl
@@ -45,7 +45,7 @@ data.teamId = {{.Team.ID}};
 {{end}}
 
 {{if not .ContextUser.IsOrganization}}
-data.organizations = [{{range .Orgs}}{'name': {{.Name}}, 'num_repos': {{.NumRepos}}, 'org_visibility': {{.Visibility}}},{{end}}];
+data.organizations = [{{range .Orgs}}{'name': {{.Name}}, 'full_name': {{.FullName}}, 'num_repos': {{.NumRepos}}, 'org_visibility': {{.Visibility}}},{{end}}];
 data.isOrganization = false;
 data.organizationsTotalCount = {{.UserOrgsCount}};
 data.canCreateOrganization = {{.SignedUser.CanCreateOrganization}};
diff --git a/tests/integration/api_fork_test.go b/tests/integration/api_fork_test.go
index 7c231415a318a..357dd27f86888 100644
--- a/tests/integration/api_fork_test.go
+++ b/tests/integration/api_fork_test.go
@@ -7,8 +7,16 @@ import (
 	"net/http"
 	"testing"
 
+	"code.gitea.io/gitea/models"
+	auth_model "code.gitea.io/gitea/models/auth"
+	"code.gitea.io/gitea/models/db"
+	org_model "code.gitea.io/gitea/models/organization"
+	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/tests"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestCreateForkNoLogin(t *testing.T) {
@@ -16,3 +24,75 @@ func TestCreateForkNoLogin(t *testing.T) {
 	req := NewRequestWithJSON(t, "POST", "/api/v1/repos/user2/repo1/forks", &api.CreateForkOption{})
 	MakeRequest(t, req, http.StatusUnauthorized)
 }
+
+func TestAPIForkListLimitedAndPrivateRepos(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	user1Sess := loginUser(t, "user1")
+	user1 := unittest.AssertExistsAndLoadBean(t, &user_model.User{Name: "user1"})
+
+	// fork into a limited org
+	limitedOrg := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 22})
+	assert.EqualValues(t, api.VisibleTypeLimited, limitedOrg.Visibility)
+
+	ownerTeam1, err := org_model.OrgFromUser(limitedOrg).GetOwnerTeam(db.DefaultContext)
+	assert.NoError(t, err)
+	assert.NoError(t, models.AddTeamMember(db.DefaultContext, ownerTeam1, user1))
+	user1Token := getTokenForLoggedInUser(t, user1Sess, auth_model.AccessTokenScopeWriteRepository, auth_model.AccessTokenScopeWriteOrganization)
+	req := NewRequestWithJSON(t, "POST", "/api/v1/repos/user2/repo1/forks", &api.CreateForkOption{
+		Organization: &limitedOrg.Name,
+	}).AddTokenAuth(user1Token)
+	MakeRequest(t, req, http.StatusAccepted)
+
+	// fork into a private org
+	user4Sess := loginUser(t, "user4")
+	user4 := unittest.AssertExistsAndLoadBean(t, &user_model.User{Name: "user4"})
+	privateOrg := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 23})
+	assert.EqualValues(t, api.VisibleTypePrivate, privateOrg.Visibility)
+
+	ownerTeam2, err := org_model.OrgFromUser(privateOrg).GetOwnerTeam(db.DefaultContext)
+	assert.NoError(t, err)
+	assert.NoError(t, models.AddTeamMember(db.DefaultContext, ownerTeam2, user4))
+	user4Token := getTokenForLoggedInUser(t, user4Sess, auth_model.AccessTokenScopeWriteRepository, auth_model.AccessTokenScopeWriteOrganization)
+	req = NewRequestWithJSON(t, "POST", "/api/v1/repos/user2/repo1/forks", &api.CreateForkOption{
+		Organization: &privateOrg.Name,
+	}).AddTokenAuth(user4Token)
+	MakeRequest(t, req, http.StatusAccepted)
+
+	t.Run("Anonymous", func(t *testing.T) {
+		defer tests.PrintCurrentTest(t)()
+
+		req := NewRequest(t, "GET", "/api/v1/repos/user2/repo1/forks")
+		resp := MakeRequest(t, req, http.StatusOK)
+
+		var forks []*api.Repository
+		DecodeJSON(t, resp, &forks)
+
+		assert.Empty(t, forks)
+		assert.EqualValues(t, "0", resp.Header().Get("X-Total-Count"))
+	})
+
+	t.Run("Logged in", func(t *testing.T) {
+		defer tests.PrintCurrentTest(t)()
+
+		req := NewRequest(t, "GET", "/api/v1/repos/user2/repo1/forks").AddTokenAuth(user1Token)
+		resp := MakeRequest(t, req, http.StatusOK)
+
+		var forks []*api.Repository
+		DecodeJSON(t, resp, &forks)
+
+		assert.Len(t, forks, 1)
+		assert.EqualValues(t, "1", resp.Header().Get("X-Total-Count"))
+
+		assert.NoError(t, models.AddTeamMember(db.DefaultContext, ownerTeam2, user1))
+
+		req = NewRequest(t, "GET", "/api/v1/repos/user2/repo1/forks").AddTokenAuth(user1Token)
+		resp = MakeRequest(t, req, http.StatusOK)
+
+		forks = []*api.Repository{}
+		DecodeJSON(t, resp, &forks)
+
+		assert.Len(t, forks, 2)
+		assert.EqualValues(t, "2", resp.Header().Get("X-Total-Count"))
+	})
+}
diff --git a/tests/integration/db_collation_test.go b/tests/integration/db_collation_test.go
index 75a4c1594fd82..acec4aa5d1e85 100644
--- a/tests/integration/db_collation_test.go
+++ b/tests/integration/db_collation_test.go
@@ -73,9 +73,12 @@ func TestDatabaseCollation(t *testing.T) {
 
 	t.Run("Convert tables to utf8mb4_bin", func(t *testing.T) {
 		defer test.MockVariableValue(&setting.Database.CharsetCollation, "utf8mb4_bin")()
-		assert.NoError(t, db.ConvertDatabaseTable())
 		r, err := db.CheckCollations(x)
 		assert.NoError(t, err)
+		assert.EqualValues(t, "utf8mb4_bin", r.ExpectedCollation)
+		assert.NoError(t, db.ConvertDatabaseTable())
+		r, err = db.CheckCollations(x)
+		assert.NoError(t, err)
 		assert.Equal(t, "utf8mb4_bin", r.DatabaseCollation)
 		assert.True(t, r.CollationEquals(r.ExpectedCollation, r.DatabaseCollation))
 		assert.Empty(t, r.InconsistentCollationColumns)
diff --git a/tests/integration/mirror_push_test.go b/tests/integration/mirror_push_test.go
index 6b1c808cf46ba..9ff4669befecf 100644
--- a/tests/integration/mirror_push_test.go
+++ b/tests/integration/mirror_push_test.go
@@ -9,7 +9,9 @@ import (
 	"net/http"
 	"net/url"
 	"strconv"
+	"strings"
 	"testing"
+	"time"
 
 	"code.gitea.io/gitea/models/db"
 	repo_model "code.gitea.io/gitea/models/repo"
@@ -32,11 +34,10 @@ func TestMirrorPush(t *testing.T) {
 }
 
 func testMirrorPush(t *testing.T, u *url.URL) {
-	defer tests.PrepareTestEnv(t)()
-
 	setting.Migrations.AllowLocalNetworks = true
 	assert.NoError(t, migrations.Init())
 
+	_ = db.TruncateBeans(db.DefaultContext, &repo_model.PushMirror{})
 	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
 	srcRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})
 
@@ -45,9 +46,10 @@ func testMirrorPush(t *testing.T, u *url.URL) {
 	})
 	assert.NoError(t, err)
 
-	ctx := NewAPITestContext(t, user.LowerName, srcRepo.Name)
+	session := loginUser(t, user.Name)
 
-	doCreatePushMirror(ctx, fmt.Sprintf("%s%s/%s", u.String(), url.PathEscape(ctx.Username), url.PathEscape(mirrorRepo.Name)), user.LowerName, userPassword)(t)
+	pushMirrorURL := fmt.Sprintf("%s%s/%s", u.String(), url.PathEscape(user.Name), url.PathEscape(mirrorRepo.Name))
+	testCreatePushMirror(t, session, user.Name, srcRepo.Name, pushMirrorURL, user.LowerName, userPassword, "0")
 
 	mirrors, _, err := repo_model.GetPushMirrorsByRepoID(db.DefaultContext, srcRepo.ID, db.ListOptions{})
 	assert.NoError(t, err)
@@ -73,49 +75,81 @@ func testMirrorPush(t *testing.T, u *url.URL) {
 	assert.Equal(t, srcCommit.ID, mirrorCommit.ID)
 
 	// Cleanup
-	doRemovePushMirror(ctx, fmt.Sprintf("%s%s/%s", u.String(), url.PathEscape(ctx.Username), url.PathEscape(mirrorRepo.Name)), user.LowerName, userPassword, int(mirrors[0].ID))(t)
+	assert.True(t, doRemovePushMirror(t, session, user.Name, srcRepo.Name, mirrors[0].ID))
 	mirrors, _, err = repo_model.GetPushMirrorsByRepoID(db.DefaultContext, srcRepo.ID, db.ListOptions{})
 	assert.NoError(t, err)
 	assert.Len(t, mirrors, 0)
 }
 
-func doCreatePushMirror(ctx APITestContext, address, username, password string) func(t *testing.T) {
-	return func(t *testing.T) {
-		csrf := GetUserCSRFToken(t, ctx.Session)
-
-		req := NewRequestWithValues(t, "POST", fmt.Sprintf("/%s/%s/settings", url.PathEscape(ctx.Username), url.PathEscape(ctx.Reponame)), map[string]string{
-			"_csrf":                csrf,
-			"action":               "push-mirror-add",
-			"push_mirror_address":  address,
-			"push_mirror_username": username,
-			"push_mirror_password": password,
-			"push_mirror_interval": "0",
-		})
-		ctx.Session.MakeRequest(t, req, http.StatusSeeOther)
-
-		flashCookie := ctx.Session.GetCookie(gitea_context.CookieNameFlash)
-		assert.NotNil(t, flashCookie)
-		assert.Contains(t, flashCookie.Value, "success")
-	}
+func testCreatePushMirror(t *testing.T, session *TestSession, owner, repo, address, username, password, interval string) {
+	req := NewRequestWithValues(t, "POST", fmt.Sprintf("/%s/%s/settings", url.PathEscape(owner), url.PathEscape(repo)), map[string]string{
+		"_csrf":                GetUserCSRFToken(t, session),
+		"action":               "push-mirror-add",
+		"push_mirror_address":  address,
+		"push_mirror_username": username,
+		"push_mirror_password": password,
+		"push_mirror_interval": interval,
+	})
+	session.MakeRequest(t, req, http.StatusSeeOther)
+
+	flashCookie := session.GetCookie(gitea_context.CookieNameFlash)
+	assert.NotNil(t, flashCookie)
+	assert.Contains(t, flashCookie.Value, "success")
+}
+
+func doRemovePushMirror(t *testing.T, session *TestSession, owner, repo string, pushMirrorID int64) bool {
+	req := NewRequestWithValues(t, "POST", fmt.Sprintf("/%s/%s/settings", url.PathEscape(owner), url.PathEscape(repo)), map[string]string{
+		"_csrf":          GetUserCSRFToken(t, session),
+		"action":         "push-mirror-remove",
+		"push_mirror_id": strconv.FormatInt(pushMirrorID, 10),
+	})
+	resp := session.MakeRequest(t, req, NoExpectedStatus)
+	flashCookie := session.GetCookie(gitea_context.CookieNameFlash)
+	return resp.Code == http.StatusSeeOther && flashCookie != nil && strings.Contains(flashCookie.Value, "success")
+}
+
+func doUpdatePushMirror(t *testing.T, session *TestSession, owner, repo string, pushMirrorID int64, interval string) bool {
+	req := NewRequestWithValues(t, "POST", fmt.Sprintf("/%s/%s/settings", owner, repo), map[string]string{
+		"_csrf":                  GetUserCSRFToken(t, session),
+		"action":                 "push-mirror-update",
+		"push_mirror_id":         strconv.FormatInt(pushMirrorID, 10),
+		"push_mirror_interval":   interval,
+		"push_mirror_defer_sync": "true",
+	})
+	resp := session.MakeRequest(t, req, NoExpectedStatus)
+	return resp.Code == http.StatusSeeOther
 }
 
-func doRemovePushMirror(ctx APITestContext, address, username, password string, pushMirrorID int) func(t *testing.T) {
-	return func(t *testing.T) {
-		csrf := GetUserCSRFToken(t, ctx.Session)
-
-		req := NewRequestWithValues(t, "POST", fmt.Sprintf("/%s/%s/settings", url.PathEscape(ctx.Username), url.PathEscape(ctx.Reponame)), map[string]string{
-			"_csrf":                csrf,
-			"action":               "push-mirror-remove",
-			"push_mirror_id":       strconv.Itoa(pushMirrorID),
-			"push_mirror_address":  address,
-			"push_mirror_username": username,
-			"push_mirror_password": password,
-			"push_mirror_interval": "0",
-		})
-		ctx.Session.MakeRequest(t, req, http.StatusSeeOther)
-
-		flashCookie := ctx.Session.GetCookie(gitea_context.CookieNameFlash)
-		assert.NotNil(t, flashCookie)
-		assert.Contains(t, flashCookie.Value, "success")
-	}
+func TestRepoSettingPushMirrorUpdate(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+	setting.Migrations.AllowLocalNetworks = true
+	assert.NoError(t, migrations.Init())
+
+	session := loginUser(t, "user2")
+	repo2 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 2})
+	testCreatePushMirror(t, session, "user2", "repo2", "https://127.0.0.1/user1/repo1.git", "", "", "24h")
+
+	pushMirrors, cnt, err := repo_model.GetPushMirrorsByRepoID(db.DefaultContext, repo2.ID, db.ListOptions{})
+	assert.NoError(t, err)
+	assert.EqualValues(t, 1, cnt)
+	assert.EqualValues(t, 24*time.Hour, pushMirrors[0].Interval)
+	repo2PushMirrorID := pushMirrors[0].ID
+
+	// update repo2 push mirror
+	assert.True(t, doUpdatePushMirror(t, session, "user2", "repo2", repo2PushMirrorID, "10m0s"))
+	pushMirror := unittest.AssertExistsAndLoadBean(t, &repo_model.PushMirror{ID: repo2PushMirrorID})
+	assert.EqualValues(t, 10*time.Minute, pushMirror.Interval)
+
+	// avoid updating repo2 push mirror from repo1
+	assert.False(t, doUpdatePushMirror(t, session, "user2", "repo1", repo2PushMirrorID, "20m0s"))
+	pushMirror = unittest.AssertExistsAndLoadBean(t, &repo_model.PushMirror{ID: repo2PushMirrorID})
+	assert.EqualValues(t, 10*time.Minute, pushMirror.Interval) // not changed
+
+	// avoid deleting repo2 push mirror from repo1
+	assert.False(t, doRemovePushMirror(t, session, "user2", "repo1", repo2PushMirrorID))
+	unittest.AssertExistsAndLoadBean(t, &repo_model.PushMirror{ID: repo2PushMirrorID})
+
+	// delete repo2 push mirror
+	assert.True(t, doRemovePushMirror(t, session, "user2", "repo2", repo2PushMirrorID))
+	unittest.AssertNotExistsBean(t, &repo_model.PushMirror{ID: repo2PushMirrorID})
 }
diff --git a/tests/integration/repo_fork_test.go b/tests/integration/repo_fork_test.go
index feebebf062081..52b55888b9dd9 100644
--- a/tests/integration/repo_fork_test.go
+++ b/tests/integration/repo_fork_test.go
@@ -9,8 +9,12 @@ import (
 	"net/http/httptest"
 	"testing"
 
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/models/db"
+	org_model "code.gitea.io/gitea/models/organization"
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/tests"
 
 	"github.com/stretchr/testify/assert"
@@ -74,3 +78,51 @@ func TestRepoForkToOrg(t *testing.T) {
 	_, exists := htmlDoc.doc.Find(`a.ui.button[href*="/fork"]`).Attr("href")
 	assert.False(t, exists, "Forking should not be allowed anymore")
 }
+
+func TestForkListLimitedAndPrivateRepos(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+	forkItemSelector := ".repo-fork-item"
+
+	user1Sess := loginUser(t, "user1")
+	user1 := unittest.AssertExistsAndLoadBean(t, &user_model.User{Name: "user1"})
+
+	// fork to a limited org
+	limitedOrg := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 22})
+	assert.EqualValues(t, structs.VisibleTypeLimited, limitedOrg.Visibility)
+	ownerTeam1, err := org_model.OrgFromUser(limitedOrg).GetOwnerTeam(db.DefaultContext)
+	assert.NoError(t, err)
+	assert.NoError(t, models.AddTeamMember(db.DefaultContext, ownerTeam1, user1))
+	testRepoFork(t, user1Sess, "user2", "repo1", limitedOrg.Name, "repo1", "")
+
+	// fork to a private org
+	user4Sess := loginUser(t, "user4")
+	user4 := unittest.AssertExistsAndLoadBean(t, &user_model.User{Name: "user4"})
+	privateOrg := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 23})
+	assert.EqualValues(t, structs.VisibleTypePrivate, privateOrg.Visibility)
+	ownerTeam2, err := org_model.OrgFromUser(privateOrg).GetOwnerTeam(db.DefaultContext)
+	assert.NoError(t, err)
+	assert.NoError(t, models.AddTeamMember(db.DefaultContext, ownerTeam2, user4))
+	testRepoFork(t, user4Sess, "user2", "repo1", privateOrg.Name, "repo1", "")
+
+	t.Run("Anonymous", func(t *testing.T) {
+		defer tests.PrintCurrentTest(t)()
+		req := NewRequest(t, "GET", "/user2/repo1/forks")
+		resp := MakeRequest(t, req, http.StatusOK)
+		htmlDoc := NewHTMLParser(t, resp.Body)
+		assert.EqualValues(t, 0, htmlDoc.Find(forkItemSelector).Length())
+	})
+
+	t.Run("Logged in", func(t *testing.T) {
+		defer tests.PrintCurrentTest(t)()
+
+		req := NewRequest(t, "GET", "/user2/repo1/forks")
+		resp := user1Sess.MakeRequest(t, req, http.StatusOK)
+		htmlDoc := NewHTMLParser(t, resp.Body)
+		assert.EqualValues(t, 1, htmlDoc.Find(forkItemSelector).Length())
+
+		assert.NoError(t, models.AddTeamMember(db.DefaultContext, ownerTeam2, user1))
+		resp = user1Sess.MakeRequest(t, req, http.StatusOK)
+		htmlDoc = NewHTMLParser(t, resp.Body)
+		assert.EqualValues(t, 2, htmlDoc.Find(forkItemSelector).Length())
+	})
+}
diff --git a/web_src/js/components/DashboardRepoList.vue b/web_src/js/components/DashboardRepoList.vue
index a6a8ccd2d11e1..3d3ac2fc69716 100644
--- a/web_src/js/components/DashboardRepoList.vue
+++ b/web_src/js/components/DashboardRepoList.vue
@@ -471,7 +471,7 @@ export default sfc; // activate the IDE's Vue plugin
           <li class="tw-flex tw-items-center tw-py-2" v-for="org in organizations" :key="org.name">
             <a class="repo-list-link muted" :href="subUrl + '/' + encodeURIComponent(org.name)">
               <svg-icon name="octicon-organization" :size="16" class-name="repo-list-icon"/>
-              <div class="text truncate">{{ org.name }}</div>
+              <div class="text truncate">{{ org.full_name ? `${org.full_name} (${org.name})` : org.name }}</div>
               <div><!-- div to prevent underline of label on hover -->
                 <span class="ui tiny basic label" v-if="org.org_visibility !== 'public'">
                   {{ org.org_visibility === 'limited' ? textOrgVisibilityLimited: textOrgVisibilityPrivate }}