medium4.3
CVE-2025-41443
Mattermost has a Missing Authorization vulnerability
Impact
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
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250822090405-e8c7e7d0252b | 8.0.0-20250822090405-e8c7e7d0252b |
| go | github.com/mattermost/mattermost-server | >= 10.5.0, < 10.5.11 | 10.5.11 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 10.5.0 before 10.5.11 from 10.11.0 before 10.11.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://mattermost.com/security-updates
- https://github.com/advisories/GHSA-7cr3-38jm-6p45
- https://nvd.nist.gov/vuln/detail/CVE-2025-41443
- https://github.com/mattermost/mattermost/pull/31327
- https://github.com/mattermost/mattermost/pull/33778
- https://github.com/mattermost/mattermost/commit/e8c7e7d0252bbf1e098aae4a5ea05d945afd7e70