MEDIUM4.3
GHSA-7cr3-38jm-6p45
Mattermost has a Missing Authorization vulnerability
Quick fix
GHSA-7cr3-38jm-6p45 — github.com/mattermost/mattermost/server/v8: upgrade to the fixed version with the command below.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20250822090405-e8c7e7d0252bDetails
Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when accessing channel information which allows guest users to discover active public channels and their metadata via the `/api/v4/teams/{team_id}/channels/ids` endpoint
Are you affected?
Enter the version of the package you're using.
Affected packages
Go/github.com/mattermost/mattermost/server/v8
Introduced in:
0Fixed in: 8.0.0-20250822090405-e8c7e7d0252bFix
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20250822090405-e8c7e7d0252bGo/github.com/mattermost/mattermost-server
Introduced in:
10.5.0Fixed in: 10.5.11Fix
go get github.com/mattermost/mattermost-server@v10.5.11Go/github.com/mattermost/mattermost-server
Introduced in:
10.11.0Fixed in: 10.11.3Fix
go get github.com/mattermost/mattermost-server@v10.11.3References
- https://nvd.nist.gov/vuln/detail/CVE-2025-41443[ADVISORY]
- https://github.com/mattermost/mattermost/pull/31327[WEB]
- https://github.com/mattermost/mattermost/pull/33778[WEB]
- https://github.com/mattermost/mattermost/commit/e8c7e7d0252bbf1e098aae4a5ea05d945afd7e70[WEB]
- https://github.com/mattermost/mattermost[PACKAGE]
- https://mattermost.com/security-updates[WEB]