CVE-2025-12689
Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request.
| Software | From | Fixed in |
|---|---|---|
| mattermost / mattermost_server | 10.11.0 | 10.11.7 |
| mattermost / mattermost_server | 10.12.0 | 10.12.3 |
| mattermost / mattermost_server | 11.0.0 | 11.0.5 |
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