GHSA-3x39-62h4-f8j6
Suggest an improvement- Source
- https://github.com/advisories/GHSA-3x39-62h4-f8j6
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-3x39-62h4-f8j6/GHSA-3x39-62h4-f8j6.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-3x39-62h4-f8j6
- Aliases
-
- CVE-2025-12419
- Published
- 2025-11-27T18:30:25Z
- Modified
- 2025-12-02T00:22:53.069706Z
- Severity
-
- 9.9 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication
- Details
-
Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost.
- Database specific
{ "nvd_published_at": "2025-11-27T16:15:46Z", "github_reviewed": true, "cwe_ids": [ "CWE-287", "CWE-303" ], "severity": "CRITICAL", "github_reviewed_at": "2025-12-01T23:56:55Z" }- References
-
- https://nvd.nist.gov/vuln/detail/CVE-2025-12419
- https://github.com/mattermost/mattermost/pull/34296
- https://github.com/mattermost/mattermost/commit/15364790cc277cfaa372693d2d5442b87f70fd42
- https://github.com/mattermost/mattermost/commit/364c2203de00fe0d8424b6b46d6f0eeb02a2539a
- https://github.com/mattermost/mattermost/commit/46b5c436bb3093cc1da3fa2455f93d4c52389eee
- https://github.com/mattermost/mattermost/commit/c3f4818afe46a7084740e809708ae22641c76d8d
- https://github.com/mattermost/mattermost/commit/d3ed703dc8330684952eb8d49a375bac6ea7b0c6
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
Affected packages
Go
github.com/mattermost/mattermost/server/v8
Package
- Name
- github.com/mattermost/mattermost/server/v8
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost/server/v8
github.com/mattermost/mattermost-server
Package
- Name
- github.com/mattermost/mattermost-server
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost-server
github.com/mattermost/mattermost-server
Package
- Name
- github.com/mattermost/mattermost-server
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost-server
github.com/mattermost/mattermost-server
Package
- Name
- github.com/mattermost/mattermost-server
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost-server
github.com/mattermost/mattermost-server
Package
- Name
- github.com/mattermost/mattermost-server
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost-server