An Access Bypass issue exists in OTRS Help Desk before 3.2.4, 3.1.14, and 3.0.19, OTRS ITSM before 3.2.3, 3.1.8, and 3.0.7, and FAQ before 2.2.3, 2.1.4, and 2.0.8. Access rights by the object linking mechanism is not verified

Open Ticket Request System (OTRS) 4.0.x before 4.0.33 and 5.0.x before 5.0.31 allows an admin to conduct an XSS attack via a modified URL because user and customer preferences are mishandled.

Open Ticket Request System (OTRS) 6.0.x before 6.0.13 allows an admin to conduct an XSS attack via a modified URL.

Open Ticket Request System (OTRS) 4.0.x before 4.0.33, 5.0.x before 5.0.31, and 6.0.x before 6.0.13 allows an authenticated user to delete files via a modified submission form because upload caching is mishandled.

The GenericInterface in OTRS Help Desk 3.2.x before 3.2.17, 3.3.x before 3.3.11, and 4.0.x before 4.0.3 allows remote authenticated users to access and modify arbitrary tickets via unspecified vectors.