low3.1
CVE-2025-10545
Mattermost has an Incorrect 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 adding channel members which allows guest users to add any team members to their private channels via the `/api/v4/channels/{channel_id}/members` endpoint
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250820115038-ff30b84049f0 | 8.0.0-20250820115038-ff30b84049f0 |
| 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-424h-xj87-m937
- https://nvd.nist.gov/vuln/detail/CVE-2025-10545
- https://github.com/mattermost/mattermost/pull/31319
- https://github.com/mattermost/mattermost/pull/33827
- https://github.com/mattermost/mattermost/commit/fb9c583f5e466a566a5122154ef337bbf2238902
- https://github.com/mattermost/mattermost/commit/ff30b84049f0193f0570d30e46cffc3602298c67