Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the OAuth state.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| github.com/mattermost/mattermost/server/v8(Go) | 0 | 8.0.0-20250807174701-e14175eb6539 | N/A |
| github.com/mattermost/mattermost-server(Go) | 10.11.0 | 10.11.2 | N/A |
| github.com/mattermost/mattermost-server(Go) | 10.10.0 | 10.10.3 | N/A |
| github.com/mattermost/mattermost-server(Go) | 10.5.0 | 10.5.11 | N/A |
CVSS Metrics
