OPSWAT MetaDefender Core before 5.1.2, MetaDefender ICAP before 4.12.1, and MetaDefender Email Gateway Security before 5.6.1 have incorrect access control, resulting in privilege escalation.
As a result of an observable discrepancy in returned messages, OPSWAT MetaDefender Core (MDCore) before 5.1.2 could allow an authenticated user to enumerate filenames on the server.