Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing groups, which allows an attacker to view group information via an API request.
Advisories
Source ID Title
EUVD EUVD EUVD-2025-15177 Mattermost Fails to Verify User's Permissions When Accessing Groups
Github GHSA Github GHSA GHSA-h356-3mfw-x368 Mattermost Fails to Verify User's Permissions When Accessing Groups
Fixes

Solution

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


Workaround

No workaround given by the vendor.

References
History

Fri, 22 Aug 2025 20:30:00 +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 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


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

Type Values Removed Values Added
Description Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing groups, which allows an attacker to view group information via an API request.
Title Improper access control to group information
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:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2025-05-15T15:47:55.224Z

Reserved: 2025-03-19T14:23:44.606Z

Link: CVE-2025-2527

cve-icon Vulnrichment

Updated: 2025-05-15T15:47:45.517Z

cve-icon NVD

Status : Analyzed

Published: 2025-05-15T16:15:33.433

Modified: 2025-08-22T20:21:35.957

Link: CVE-2025-2527

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-07-12T15:26:08Z