The version of Mattermost Server running on the remote host is prior to 7.1.6 or 7.2.x prior to 7.7.2. It is, therefore, affected by an information disclosure vulnerability. When running in a High Availability configuration, Mattermost fails to sanitize some of the user_updated and post_deleted events broadcast to all users, leading to disclosure of sensitive information to some of the users with currently connected Websocket clients.

Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.Read More