attachment_send.php in Cerberus Helpdesk allows remote attackers to view attachments and tickets of other users via a modified file_id parameter.
Cerberus Helpdesk 0.97.3 allows remote attackers to obtain sensitive information via certain requests to (1) reports.php, (2) knowledgebase.php, or (3) configuration.php, which leaks the information in a PHP error message.
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.