CVE-2025-12421
unknown
CVSS v3
—
CVSS v2
—
VIR risk
—
Description
Mattermost fails to to verify the token used during code exchange 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 | <8.0.0-20251022210333-acda1fb5dd46 | 8.0.0-20251022210333-acda1fb5dd46 |
| Go | github.com/mattermost/mattermost-server | >=11.0.0,<11.0.3 | 11.0.3 |
| Go | github.com/mattermost/mattermost-server | >=10.12.0,<10.12.2 | 10.12.2 |
| Go | github.com/mattermost/mattermost-server | >=10.11.0,<10.11.5 | 10.11.5 |
| Go | github.com/mattermost/mattermost-server | >=10.5.0,<10.5.13 | 10.5.13 |
| Go | github.com/mattermost/mattermost-server | | |
| Go | github.com/mattermost/mattermost-server/v5 | | |
| Go | github.com/mattermost/mattermost-server/v6 | | |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-12421
- 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://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
- https://github.com/advisories/GHSA-mp6x-97xj-9x62
Verify integrity in audit chain (admin only). AS-IS.