CVSS 3.1
5.7 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:NCVE-2025-13821
Medium (5.7) in mattermost mattermost server. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost/server/v8 8.0.0-20251210191531-cd17b61de41b.
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to sanitize sensitive data in WebSocket messages which allows authenticated users to exfiltrate password hashes and MFA secrets via profile nickname updates or email verification events. Mattermost Advisory ID: MMSA-2025-00560
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-31)
- CWE
- CWE-200
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-pp9j-pf5c-659x | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20251210191531-cd17b61de41b | 8.0.0-20251210191531-cd17b61de41b |
| GHSA-pp9j-pf5c-659x | Go | github.com/mattermost/mattermost-server | >=11.1.0 | no fix published |
| GHSA-pp9j-pf5c-659x | Go | github.com/mattermost/mattermost-server | >=10.11.0 | no fix published |
| GHSA-pp9j-pf5c-659x | Go | github.com/mattermost/mattermost-server | >=11.2.0 | no fix published |
| GHSA-pp9j-pf5c-659x | Go | github.com/mattermost/mattermost-server | <5.3.2-0.20251210191531-cd17b61de41b | 5.3.2-0.20251210191531-cd17b61de41b |
| GO-2026-4524 | Go | github.com/mattermost/mattermost-server | all versions | no fix published |
| GO-2026-4524 | Go | github.com/mattermost/mattermost-server | >=10.11.0+incompatible | no fix published |
| GO-2026-4524 | Go | github.com/mattermost/mattermost-server | >=11.1.0+incompatible | no fix published |
| GO-2026-4524 | Go | github.com/mattermost/mattermost-server | >=11.2.0+incompatible | no fix published |
| GO-2026-4524 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2026-4524 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2026-4524 | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20251210191531-cd17b61de41b | 8.0.0-20251210191531-cd17b61de41b |