diff --git a/integrations/pull_create_test.go b/integrations/pull_create_test.go
index 89abccf883c..1d53aa3b6e4 100644
--- a/integrations/pull_create_test.go
+++ b/integrations/pull_create_test.go
@@ -14,7 +14,7 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func testPullCreate(t *testing.T, session *TestSession, user, repo, branch string) *httptest.ResponseRecorder {
+func testPullCreate(t *testing.T, session *TestSession, user, repo, branch, title string) *httptest.ResponseRecorder {
 	req := NewRequest(t, "GET", path.Join(user, repo))
 	resp := session.MakeRequest(t, req, http.StatusOK)
 
@@ -35,7 +35,7 @@ func testPullCreate(t *testing.T, session *TestSession, user, repo, branch strin
 	assert.True(t, exists, "The template has changed")
 	req = NewRequestWithValues(t, "POST", link, map[string]string{
 		"_csrf": htmlDoc.GetCSRF(),
-		"title": "This is a pull title",
+		"title": title,
 	})
 	resp = session.MakeRequest(t, req, http.StatusFound)
 
@@ -47,7 +47,7 @@ func TestPullCreate(t *testing.T) {
 	session := loginUser(t, "user1")
 	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
 	testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")
-	resp := testPullCreate(t, session, "user1", "repo1", "master")
+	resp := testPullCreate(t, session, "user1", "repo1", "master", "This is a pull title")
 
 	// check the redirected URL
 	url := resp.HeaderMap.Get("Location")
@@ -68,3 +68,38 @@ func TestPullCreate(t *testing.T) {
 	assert.Regexp(t, `Subject: \[PATCH\] Update 'README.md'`, resp.Body)
 	assert.NotRegexp(t, "diff.*diff", resp.Body) // not two diffs, just one
 }
+
+func TestPullCreate_TitleEscape(t *testing.T) {
+	prepareTestEnv(t)
+	session := loginUser(t, "user1")
+	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
+	testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")
+	resp := testPullCreate(t, session, "user1", "repo1", "master", "<i>XSS PR</i>")
+
+	// check the redirected URL
+	url := resp.HeaderMap.Get("Location")
+	assert.Regexp(t, "^/user2/repo1/pulls/[0-9]*$", url)
+
+	// Edit title
+	req := NewRequest(t, "GET", url)
+	resp = session.MakeRequest(t, req, http.StatusOK)
+	htmlDoc := NewHTMLParser(t, resp.Body)
+	editTestTitleURL, exists := htmlDoc.doc.Find("#save-edit-title").First().Attr("data-update-url")
+	assert.True(t, exists, "The template has changed")
+
+	req = NewRequestWithValues(t, "POST", editTestTitleURL, map[string]string{
+		"_csrf": htmlDoc.GetCSRF(),
+		"title": "<u>XSS PR</u>",
+	})
+	session.MakeRequest(t, req, http.StatusOK)
+
+	req = NewRequest(t, "GET", url)
+	resp = session.MakeRequest(t, req, http.StatusOK)
+	htmlDoc = NewHTMLParser(t, resp.Body)
+	titleHTML, err := htmlDoc.doc.Find(".comments .event .text b").First().Html()
+	assert.NoError(t, err)
+	assert.Equal(t, "&lt;i&gt;XSS PR&lt;/i&gt;", titleHTML)
+	titleHTML, err = htmlDoc.doc.Find(".comments .event .text b").Next().Html()
+	assert.NoError(t, err)
+	assert.Equal(t, "&lt;u&gt;XSS PR&lt;/u&gt;", titleHTML)
+}
diff --git a/integrations/pull_merge_test.go b/integrations/pull_merge_test.go
index b123239331a..aabb2c78fcc 100644
--- a/integrations/pull_merge_test.go
+++ b/integrations/pull_merge_test.go
@@ -56,7 +56,7 @@ func TestPullMerge(t *testing.T) {
 	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
 	testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")
 
-	resp := testPullCreate(t, session, "user1", "repo1", "master")
+	resp := testPullCreate(t, session, "user1", "repo1", "master", "This is a pull title")
 
 	elem := strings.Split(test.RedirectURL(resp), "/")
 	assert.EqualValues(t, "pulls", elem[3])
@@ -69,7 +69,7 @@ func TestPullRebase(t *testing.T) {
 	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
 	testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")
 
-	resp := testPullCreate(t, session, "user1", "repo1", "master")
+	resp := testPullCreate(t, session, "user1", "repo1", "master", "This is a pull title")
 
 	elem := strings.Split(test.RedirectURL(resp), "/")
 	assert.EqualValues(t, "pulls", elem[3])
@@ -83,7 +83,7 @@ func TestPullSquash(t *testing.T) {
 	testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")
 	testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited!)\n")
 
-	resp := testPullCreate(t, session, "user1", "repo1", "master")
+	resp := testPullCreate(t, session, "user1", "repo1", "master", "This is a pull title")
 
 	elem := strings.Split(test.RedirectURL(resp), "/")
 	assert.EqualValues(t, "pulls", elem[3])
@@ -96,7 +96,7 @@ func TestPullCleanUpAfterMerge(t *testing.T) {
 	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
 	testEditFileToNewBranch(t, session, "user1", "repo1", "master", "feature/test", "README.md", "Hello, World (Edited)\n")
 
-	resp := testPullCreate(t, session, "user1", "repo1", "feature/test")
+	resp := testPullCreate(t, session, "user1", "repo1", "feature/test", "This is a pull title")
 
 	elem := strings.Split(test.RedirectURL(resp), "/")
 	assert.EqualValues(t, "pulls", elem[3])
diff --git a/integrations/repo_activity_test.go b/integrations/repo_activity_test.go
index 40983cbe1a8..fcdbda2c893 100644
--- a/integrations/repo_activity_test.go
+++ b/integrations/repo_activity_test.go
@@ -22,16 +22,16 @@ func TestRepoActivity(t *testing.T) {
 	// Create PRs (1 merged & 2 proposed)
 	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
 	testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")
-	resp := testPullCreate(t, session, "user1", "repo1", "master")
+	resp := testPullCreate(t, session, "user1", "repo1", "master", "This is a pull title")
 	elem := strings.Split(test.RedirectURL(resp), "/")
 	assert.EqualValues(t, "pulls", elem[3])
 	testPullMerge(t, session, elem[1], elem[2], elem[4], models.MergeStyleMerge)
 
 	testEditFileToNewBranch(t, session, "user1", "repo1", "master", "feat/better_readme", "README.md", "Hello, World (Edited Again)\n")
-	testPullCreate(t, session, "user1", "repo1", "feat/better_readme")
+	testPullCreate(t, session, "user1", "repo1", "feat/better_readme", "This is a pull title")
 
 	testEditFileToNewBranch(t, session, "user1", "repo1", "master", "feat/much_better_readme", "README.md", "Hello, World (Edited More)\n")
-	testPullCreate(t, session, "user1", "repo1", "feat/much_better_readme")
+	testPullCreate(t, session, "user1", "repo1", "feat/much_better_readme", "This is a pull title")
 
 	// Create issues (3 new issues)
 	testNewIssue(t, session, "user2", "repo1", "Issue 1", "Description 1")
diff --git a/templates/repo/issue/view_content/comments.tmpl b/templates/repo/issue/view_content/comments.tmpl
index 49a0216e832..3557c5d3c1d 100644
--- a/templates/repo/issue/view_content/comments.tmpl
+++ b/templates/repo/issue/view_content/comments.tmpl
@@ -103,7 +103,7 @@
 					<img src="{{.Poster.RelAvatarLink}}">
 				</a>
 				<span class="text grey"><a href="{{.Poster.HomeLink}}">{{.Poster.Name}}</a>
-				{{if .Content}}{{$.i18n.Tr "repo.issues.add_label_at" .Label.ForegroundColor .Label.Color .Label.Name $createdStr | Safe}}{{else}}{{$.i18n.Tr "repo.issues.remove_label_at" .Label.ForegroundColor .Label.Color .Label.Name $createdStr | Safe}}{{end}}</span>
+				{{if .Content}}{{$.i18n.Tr "repo.issues.add_label_at" .Label.ForegroundColor .Label.Color (.Label.Name|Escape) $createdStr | Safe}}{{else}}{{$.i18n.Tr "repo.issues.remove_label_at" .Label.ForegroundColor .Label.Color (.Label.Name|Escape) $createdStr | Safe}}{{end}}</span>
 			</div>
 		{{end}}
 	{{else if eq .Type 8}}
@@ -113,7 +113,7 @@
 				<img src="{{.Poster.RelAvatarLink}}">
 			</a>
 			<span class="text grey"><a href="{{.Poster.HomeLink}}">{{.Poster.Name}}</a>
-			{{if gt .OldMilestoneID 0}}{{if gt .MilestoneID 0}}{{$.i18n.Tr "repo.issues.change_milestone_at" .OldMilestone.Name .Milestone.Name $createdStr | Safe}}{{else}}{{$.i18n.Tr "repo.issues.remove_milestone_at" .OldMilestone.Name $createdStr | Safe}}{{end}}{{else if gt .MilestoneID 0}}{{$.i18n.Tr "repo.issues.add_milestone_at" .Milestone.Name $createdStr | Safe}}{{end}}</span>
+			{{if gt .OldMilestoneID 0}}{{if gt .MilestoneID 0}}{{$.i18n.Tr "repo.issues.change_milestone_at" (.OldMilestone.Name|Escape) (.Milestone.Name|Escape) $createdStr | Safe}}{{else}}{{$.i18n.Tr "repo.issues.remove_milestone_at" (.OldMilestone.Name|Escape) $createdStr | Safe}}{{end}}{{else if gt .MilestoneID 0}}{{$.i18n.Tr "repo.issues.add_milestone_at" (.Milestone.Name|Escape) $createdStr | Safe}}{{end}}</span>
 		</div>
 	{{else if eq .Type 9}}
 		<div class="event">
@@ -131,23 +131,23 @@
 	{{else if eq .Type 10}}
 		<div class="event">
 			<span class="octicon octicon-primitive-dot"></span>
+			<a class="ui avatar image" href="{{.Poster.HomeLink}}">
+				<img src="{{.Poster.RelAvatarLink}}">
+			</a>
+			<span class="text grey"><a href="{{.Poster.HomeLink}}">{{.Poster.Name}}</a>
+			{{$.i18n.Tr "repo.issues.change_title_at" (.OldTitle|Escape) (.NewTitle|Escape) $createdStr | Safe}}
+			</span>
 		</div>
-		<a class="ui avatar image" href="{{.Poster.HomeLink}}">
-			<img src="{{.Poster.RelAvatarLink}}">
-		</a>
-		<span class="text grey"><a href="{{.Poster.HomeLink}}">{{.Poster.Name}}</a>
-		{{$.i18n.Tr "repo.issues.change_title_at" .OldTitle .NewTitle $createdStr | Safe}}
-		</span>
 	{{else if eq .Type 11}}
 		<div class="event">
 			<span class="octicon octicon-primitive-dot"></span>
+			<a class="ui avatar image" href="{{.Poster.HomeLink}}">
+				<img src="{{.Poster.RelAvatarLink}}">
+			</a>
+			<span class="text grey"><a href="{{.Poster.HomeLink}}">{{.Poster.Name}}</a>
+			{{$.i18n.Tr "repo.issues.delete_branch_at" .CommitSHA $createdStr | Safe}}
+			</span>
 		</div>
-		<a class="ui avatar image" href="{{.Poster.HomeLink}}">
-			<img src="{{.Poster.RelAvatarLink}}">
-		</a>
-		<span class="text grey"><a href="{{.Poster.HomeLink}}">{{.Poster.Name}}</a>
-		{{$.i18n.Tr "repo.issues.delete_branch_at" .CommitSHA $createdStr | Safe}}
-		</span>
     {{else if eq .Type 12}}
 		<div class="event">
 			<span class="octicon octicon-primitive-dot"></span>
diff --git a/templates/repo/wiki/view.tmpl b/templates/repo/wiki/view.tmpl
index dfd368cd3d7..93b7c106401 100644
--- a/templates/repo/wiki/view.tmpl
+++ b/templates/repo/wiki/view.tmpl
@@ -104,7 +104,7 @@
 		{{.i18n.Tr "repo.wiki.delete_page_button"}}
 	</div>
 	<div class="content">
-		<p>{{.i18n.Tr "repo.wiki.delete_page_notice_1" $title | Safe}}</p>
+		<p>{{.i18n.Tr "repo.wiki.delete_page_notice_1" ($title|Escape) | Safe}}</p>
 	</div>
 	{{template "base/delete_modal_actions" .}}
 </div>