Multiple cross-site scripting (XSS) vulnerabilities in Phorum 3.4.5 and earlier allow remote attackers to inject arbitrary HTML or web script via (1) the phorum_check_xss function in common.php, (2) the EditError variable in profile.php, and (3) the Error variable in login.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/14145
http://www.securitytracker.com/id?1008633
http://www.securityfocus.com/bid/9361