mattermost/mattermost · Security
Mattermost has an Incorrect Authorization vulnerability
- GHSA ID
- GHSA-424h-xj87-m937
- CVE ID
- CVE-2025-10545
- Severity
- low
- Published
- Updated
- CVSS
- 3.1 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
- CVSS v3
- 3.1 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Description
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
CWEs
- CWE-863 · Incorrect Authorization
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-10545 ↗
- https://mattermost.com/security-updates ↗
- 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 ↗
- https://github.com/advisories/GHSA-424h-xj87-m937 ↗