VDB
GO-2025-4170
GO-2025-4170
PUBLISHED
CVSS 9.300000190734863 CRITICAL
Mattermost fails to to verify the token used during code exchange in github.com/mattermost/mattermost-server
Risk Scores
CVSS v4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| github.com | mattermost/mattermost-server/v5 | 0, 0 |
| github.com | mattermost/mattermost/server/v8 | 0, 0 |
| github.com | mattermost/mattermost-server | 0, 0 |
| github.com | mattermost/mattermost-server/v6 | 0, 0 |
Timeline
- Dec 15, 2025 CVE Published
- Mar 3, 2026 CVE Updated
- May 1, 2026 Security Advisory
References
- https://github.com/advisories/GHSA-mp6x-97xj-9x62 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-12421 advisory
- https://github.com/mattermost/mattermost/commit/5072bbf689a46b3b97b2373f26149f5891396e6b url
- https://github.com/mattermost/mattermost/commit/acda1fb5dd46a2f46c76ae67012423c760525eaa url
- https://github.com/mattermost/mattermost/commit/f361e7d75a7ab9df5a2106e1ceb919b94b55e41d url
- https://github.com/mattermost/mattermost/commit/feb598ed2b7ac3cb78a253b032ad7e4628b0de00 url
- https://mattermost.com/security-updates url