In Open Ticket Request System (OTRS) 3.3.x before 3.3.18, 4.x before 4.0.25, and 5.x before 5.0.23, remote authenticated users can leverage statistics-write permissions to gain privileges via code injection.
In Open Ticket Request System (OTRS) 3.3.x through 3.3.16, 4.x through 4.0.23, and 5.x through 5.0.19, an attacker with agent permission is capable of opening a specific URL in a browser to gain administrative privileges / full access. Afterward, all system settings can be read and changed. The URLs in question contain index.pl?Action=Installer with ;Subaction=Intro or ;Subaction=Start or ;Subaction=System appended at the end.
The iPhoneHandle package 0.9.x before 0.9.7 and 1.0.x before 1.0.3 in Open Ticket Request System (OTRS) does not properly restrict use of the iPhoneHandle interface, which allows remote authenticated users to gain privileges, and consequently read or modify OTRS core objects, via unspecified vectors.