Mattermost versions 10.0.x <= 10.0.1, 10.1.x <= 10.1.1, 9.11.x <= 9.11.3, 9.5.x <= 9.5.11 fail to properly validate email addresses which allows an unauthenticated user to bypass email domain restrictions via carefully crafted input on email registration.
| Software | From | Fixed in |
|---|---|---|
| mattermost / mattermost_server | 9.5.0 | 9.5.12 |
| mattermost / mattermost_server | 9.11.0 | 9.11.4 |
| mattermost / mattermost_server | 10.0.0 | 10.0.2 |
| mattermost / mattermost_server | 10.1.0 | 10.1.2 |