diff -ruN dokuwiki-2011-05-25a.orig/inc/html.php dokuwiki-2011-05-25a/inc/html.php
--- dokuwiki-2011-05-25a.orig/inc/html.php	2011-06-14 21:58:53.000000000 +0200
+++ dokuwiki-2011-05-25a/inc/html.php	2012-04-24 06:59:27.365004291 +0200
@@ -1283,7 +1283,7 @@
     global $TEXT;
 
     if ($param['target'] !== 'section') {
-        msg('No editor for edit target ' . $param['target'] . ' found.', -1);
+        msg('No editor for edit target ' . hsc($param['target']) . ' found.', -1);
     }
 
     $attr = array('tabindex'=>'1');