CVE-2021-39164 log

Severity Medium
Remote Yes
Type Information disclosure
In matrix-synapse versions 1.41.0 and prior, unauthorised users can access the membership (list of members, with their display names) of a room if they know the ID of the room. The vulnerability is limited to rooms with `shared` history visibility. Furthermore, the unauthorised user must be using an account on a vulnerable homeserver that is in the room.
Group Package Affected Fixed Severity Status Ticket
AVG-2334 matrix-synapse 1.40.0-1 1.41.1-1 Medium Fixed