Description
Mattermost versions 9.8.0, 9.7.x <= 9.7.4, 9.6.x <= 9.6.2 and 9.5.x <= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mattermost Mattermost
Default version status: unaffected
9.8.0affected9.7.0 to ≤ 9.7.4affected9.6.0 to ≤ 9.6.2affected9.5.0 to ≤ 9.5.5affected9.9.0unaffected9.8.1unaffected9.7.5unaffected9.6.3unaffected9.5.6unaffected