diff --git a/mod/wiki/editcomments.php b/mod/wiki/editcomments.php
index ebdddb4cbf615..4abb33a522063 100644
--- a/mod/wiki/editcomments.php
+++ b/mod/wiki/editcomments.php
@@ -64,6 +64,9 @@
     if (!$comment = $DB->get_record('comments', array('id' => $commentid))) {
         print_error('invalidcomment');
     }
+    if ($USER->id != $comment->userid) {
+        throw new \moodle_exception('cannotviewpage', 'wiki');
+    }
 }
 
 $editcomments->set_page($page);
diff --git a/mod/wiki/pagelib.php b/mod/wiki/pagelib.php
index 16b9e22918581..58c608d64ad2a 100644
--- a/mod/wiki/pagelib.php
+++ b/mod/wiki/pagelib.php
@@ -835,7 +835,7 @@ private function edit_comment_form($com) {
 
         if ($this->format == 'html') {
             $com->action = 'edit';
-            $com->entrycomment_editor['text'] = $com->content;
+            $com->entrycomment_editor['text'] = clean_text($com->content, $this->format);
             $com->commentoptions = array('trusttext' => true, 'maxfiles' => 0);
 
             $this->form->set_data($com);