attachment_send.php in Cerberus Helpdesk allows remote attackers to view attachments and tickets of other users via a modified file_id parameter.
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.
Cerberus Helpdesk before 4.0 (Build 600) allows remote attackers to obtain sensitive information via direct requests for "controllers ... that aren't standard helpdesk pages," possibly involving the (1) /display and (2) /kb URIs.