diff -r fe4de34822a5 -r 479dd7993ef9 src/main/kotlin/de/uapcore/lightpit/servlet/ProjectServlet.kt
--- a/src/main/kotlin/de/uapcore/lightpit/servlet/ProjectServlet.kt	Mon Aug 02 15:13:04 2021 +0200
+++ b/src/main/kotlin/de/uapcore/lightpit/servlet/ProjectServlet.kt	Mon Aug 02 17:04:17 2021 +0200
@@ -441,7 +441,6 @@
             with(http) {
                 pageTitle = "${projectInfo.project.name}: #${issue.id} ${issue.subject}"
                 view = IssueDetailView(issue, comments, project, version, component)
-                // TODO: feed path for this particular issue
                 feedPath = feedPath(projectInfo.project)
                 navigationMenu = activeProjectNavMenu(
                     dao.listProjects(),
@@ -450,6 +449,7 @@
                     component
                 )
                 styleSheets = listOf("projects")
+                javascript = "issue-editor"
                 render("issue-view")
             }
         }
@@ -492,6 +492,7 @@
                     component
                 )
                 styleSheets = listOf("projects")
+                javascript = "issue-editor"
                 render("issue-form")
             }
         }
@@ -506,13 +507,26 @@
             }
 
             // TODO: throw validator exception instead of using a default
-            val comment = IssueComment(-1, issue.id).apply {
-                author = http.remoteUser?.let { dao.findUserByName(it) }
-                comment = http.param("comment") ?: ""
+
+            val commentId = http.param("commentid")?.toIntOrNull() ?: -1
+            if (commentId > 0) {
+                val comment = dao.findComment(commentId)
+                val originalAuthor = comment?.author?.username
+                if (originalAuthor != null && originalAuthor == http.remoteUser) {
+                    comment.comment = http.param("comment") ?: ""
+                    dao.updateComment(comment)
+                } else {
+                    http.response.sendError(403)
+                    return
+                }
+            } else {
+                val comment = IssueComment(-1, issue.id).apply {
+                    author = http.remoteUser?.let { dao.findUserByName(it) }
+                    comment = http.param("comment") ?: ""
+                }
+                dao.insertComment(comment)
             }
 
-            dao.insertComment(comment)
-
             http.renderCommit("${issuesHref}${issue.id}")
         }
     }