Cross-site scripting (XSS) vulnerability in passwd/main.php in the Passwd module before 3.1.1 for Horde allows remote attackers to inject arbitrary web script or HTML via the backend parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/51542
http://www.vupen.com/english/advisories/2009/1784
http://www.debian.org/security/2009/dsa-1829
http://secunia.com/advisories/35769
http://secunia.com/advisories/35720