CVE-2025-10545
LOW3.1EPSS 0.01%Mattermost has an Incorrect Authorization vulnerability
Published: 10/16/2025Modified: 11/5/2025
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
Affected packages (6)
- Go/github.com/mattermost/mattermost-server>= 10.5.0, < 10.5.11
- Go/github.com/mattermost/mattermost-server>= 10.5.0+incompatible, < 10.5.11+incompatible, >= 10.11.0+incompatible, < 10.11.3+incompatible
- Go/github.com/mattermost/mattermost-server/v5from 0
- Go/github.com/mattermost/mattermost-server/v6from 0
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250820115038-ff30b84049f0
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250820115038-ff30b84049f0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
References (8)
- ADVISORYhttps://github.com/advisories/GHSA-424h-xj87-m937
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-10545
- PATCHhttps://github.com/mattermost/mattermost
- WEBhttps://github.com/mattermost/mattermost/commit/fb9c583f5e466a566a5122154ef337bbf2238902
- WEBhttps://github.com/mattermost/mattermost/commit/ff30b84049f0193f0570d30e46cffc3602298c67
- WEBhttps://github.com/mattermost/mattermost/pull/31319
- WEBhttps://github.com/mattermost/mattermost/pull/33827
- WEBhttps://mattermost.com/security-updates