Go/github.com/mattermost/mattermost-server/v5 CVE-2025-12421: critical 9.9, EPSS 0.34%
Mattermost fails to to verify the token used during code exchange in github.com/mattermost/mattermost-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2025-4170#Go/github.com/mattermost/mattermost-server/v5
- nvd: CVE-2025-12421
- https://github.com/advisories/GHSA-mp6x-97xj-9x62
- https://github.com/mattermost/mattermost/commit/5072bbf689a46b3b97b2373f26149f5891396e6b
- https://github.com/mattermost/mattermost/commit/acda1fb5dd46a2f46c76ae67012423c760525eaa
- https://github.com/mattermost/mattermost/commit/f361e7d75a7ab9df5a2106e1ceb919b94b55e41d
- https://github.com/mattermost/mattermost/commit/feb598ed2b7ac3cb78a253b032ad7e4628b0de00
- https://mattermost.com/security-updates
CVE-2025-12421 · published · modified · JSON