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commit 6652367d656de7e5f404935be04e10aa281add53
Author: Aleksander Machniak <alec@alec.pl>
Date:   Fri May 6 08:28:15 2016 +0200

    Fix XSS issue in href attribute on area tag (#5240, #5241)

diff --git a/program/lib/Roundcube/rcube_washtml.php b/program/lib/Roundcube/rcube_washtml.php
index 5938d9b..d03f04a 100644
--- program/lib/Roundcube/rcube_washtml.php
+++ program/lib/Roundcube/rcube_washtml.php
@@ -370,7 +370,7 @@ class rcube_washtml
      */
     private function is_link_attribute($tag, $attr)
     {
-        return $tag == 'a' && $attr == 'href';
+        return ($tag == 'a' || $tag == 'area') && $attr == 'href';
     }
 
     /**