CVE-2025-13821
unknown
CVSS v3
—
CVSS v2
—
VIR risk
—
Description
Mattermost fails to sanitize sensitive data in WebSocket messages in github.com/mattermost/mattermost-server
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20251210191531-cd17b61de41b | 8.0.0-20251210191531-cd17b61de41b |
| Go | github.com/mattermost/mattermost-server | >=11.1.0 | |
| Go | github.com/mattermost/mattermost-server | >=10.11.0 | |
| Go | github.com/mattermost/mattermost-server | >=11.2.0 | |
| Go | github.com/mattermost/mattermost-server | <5.3.2-0.20251210191531-cd17b61de41b | 5.3.2-0.20251210191531-cd17b61de41b |
| Go | github.com/mattermost/mattermost-server | | |
| Go | github.com/mattermost/mattermost-server | >=10.11.0+incompatible | |
| Go | github.com/mattermost/mattermost-server | >=11.1.0+incompatible | |
| Go | github.com/mattermost/mattermost-server | >=11.2.0+incompatible | |
| Go | github.com/mattermost/mattermost-server/v5 | | |
| Go | github.com/mattermost/mattermost-server/v6 | | |
References
Verify integrity in audit chain (admin only). AS-IS.