GHSA-mp6x-97xj-9x62
Suggest an improvement- Source
- https://github.com/advisories/GHSA-mp6x-97xj-9x62
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-mp6x-97xj-9x62/GHSA-mp6x-97xj-9x62.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/GHSA-mp6x-97xj-9x62
- Aliases
-
- CVE-2025-12421
- Published
- 2025-11-27T18:30:26Z
- Modified
- 2025-12-02T15:27:46.333565Z
- 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 to verify the token used during code exchange
- Details
-
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email address used when switching authentication methods and sending a request to the /users/login/sso/code-exchange endpoint. The vulnerability requires ExperimentalEnableAuthenticationTransfer to be enabled (default: enabled) and RequireEmailVerification to be disabled (default: disabled).
- Database specific
{ "severity": "CRITICAL", "github_reviewed": true, "github_reviewed_at": "2025-12-01T23:57:10Z", "nvd_published_at": "2025-11-27T18:15:46Z", "cwe_ids": [ "CWE-287", "CWE-303" ] }- 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
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