| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | < 11.1.0< 11.1.0+incompatible | 11.1.011.1.0+incompatible |
| github.com/mattermost/mattermost-server/v5 | all versions | |
| github.com/mattermost/mattermost-server/v6 | all versions | |
| github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250912063506-7d8b7b5e4a60 | 8.0.0-20250912063506-7d8b7b5e4a60 |
| mattermost server | < 11.0.0 | 11.0.0 |
Mattermost versions < 11 fail to enforce multi-factor authentication on WebSocket connections which allows unauthenticated users to access sensitive information via WebSocket events.
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free