rpc.php in Cerberus Helpdesk 3.2.1 does not verify a client's privileges for a display_get_requesters operation, which allows remote attackers to bypass the GUI login and obtain sensitive information (ticket data) via a direct request.
https://exchange.xforce.ibmcloud.com/vulnerabilities/29655
http://www.vupen.com/english/advisories/2006/4089
http://www.securityfocus.com/bid/20598