Mattermost fails to properly invalidate personal access tokens upon user deactivation

Mattermost versions 10.7.x = 10.7.0, 10.6.x = 10.6.2, 10.5.x = 10.5.3, 9.11.x = 9.11.12 fails to properly invalidate personal access tokens upon user deactivation, allowing deactivated users to maintain full system access by exploiting access token validation flaws via continued usage of previous...