Open Ticket Request System (OTRS) before 2.4.0-beta2 does not properly enforce the move_into permission setting for a queue, which allows remote authenticated users to bypass intended access restrictions and read a ticket by watching this ticket, and then selecting the ticket from the watched-tickets list.
Exploitability
AV:NAC:HAu:SImpact
C:PI:NA:N2.1/AV:N/AC:H/Au:S/C:P/I:N/A:N