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 previously issued tokens.
Weakness
The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mattermost_server | Mattermost | 9.11.0 (including) | 9.11.13 (excluding) |
| Mattermost_server | Mattermost | 10.5.0 (including) | 10.5.4 (excluding) |
| Mattermost_server | Mattermost | 10.6.0 (including) | 10.6.3 (excluding) |
| Mattermost_server | Mattermost | 10.7.0 (including) | 10.7.1 (excluding) |