GO-2025-4168
Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication in github.com/mattermost/mattermost-server
Quick fix
GO-2025-4168 — github.com/mattermost/mattermost/server/v8: upgrade to the fixed version with the command below.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20251028000919-d3ed703dc833Details
Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication in github.com/mattermost/mattermost-server.
NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.
(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)
The additional affected modules and versions are: github.com/mattermost/mattermost-server from v10.5.0 before v10.5.13, from v10.11.0 before v10.11.5, from v10.12.0 before v10.12.2, from v11.0.0 before v11.0.4.
Are you affected?
Enter the version of the package you're using.
Affected packages
0No fixed version published yet for github.com/mattermost/mattermost-server (go modules). Pin to a known-safe version or switch to an alternative.
0No fixed version published yet for github.com/mattermost/mattermost-server/v5 (go modules). Pin to a known-safe version or switch to an alternative.
0No fixed version published yet for github.com/mattermost/mattermost-server/v6 (go modules). Pin to a known-safe version or switch to an alternative.
0Fixed in: 8.0.0-20251028000919-d3ed703dc833go get github.com/mattermost/mattermost/server/v8@v8.0.0-20251028000919-d3ed703dc833References
- https://github.com/advisories/GHSA-3x39-62h4-f8j6[ADVISORY]
- https://nvd.nist.gov/vuln/detail/CVE-2025-12419[ADVISORY]
- https://github.com/mattermost/mattermost/commit/15364790cc277cfaa372693d2d5442b87f70fd42[WEB]
- https://github.com/mattermost/mattermost/commit/364c2203de00fe0d8424b6b46d6f0eeb02a2539a[WEB]
- https://github.com/mattermost/mattermost/commit/46b5c436bb3093cc1da3fa2455f93d4c52389eee[WEB]
- https://github.com/mattermost/mattermost/commit/c3f4818afe46a7084740e809708ae22641c76d8d[WEB]
- https://github.com/mattermost/mattermost/commit/d3ed703dc8330684952eb8d49a375bac6ea7b0c6[WEB]
- https://github.com/mattermost/mattermost/pull/34296[WEB]
- https://mattermost.com/security-updates[WEB]