Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.
Advisories
Source ID Title
EUVD EUVD EUVD-2025-15149 Mattermost Fails to Validate Team Invite Permissions
Github GHSA Github GHSA GHSA-r7r2-m3vr-c8qc Mattermost Fails to Validate Team Invite Permissions
Fixes

Solution

Update Mattermost to versions 10.7.0, 10.6.2, 10.5.3, 10.4.5, 9.11.12 or higher.


Workaround

No workaround given by the vendor.

References
History

Mon, 29 Sep 2025 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost mattermost Server

Thu, 15 May 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 15 May 2025 10:45:00 +0000

Type Values Removed Values Added
Description Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.
Title Members Without Guest Invite Permissions Can Add Guests to Teams
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2025-05-15T13:41:54.267Z

Reserved: 2025-04-08T11:30:51.635Z

Link: CVE-2025-3446

cve-icon Vulnrichment

Updated: 2025-05-15T13:41:21.898Z

cve-icon NVD

Status : Analyzed

Published: 2025-05-15T11:15:48.777

Modified: 2025-09-29T21:05:33.320

Link: CVE-2025-3446

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-06-24T09:44:20Z