Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the RelayState
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-r6qj-894f-5hr2 Mattermost has a Missing Authorization vulnerability
Fixes

Solution

Update Mattermost to versions 10.12.0, 10.11.2, 10.10.3, 10.5.11 or higher.


Workaround

No workaround given by the vendor.

References
History

Thu, 16 Oct 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Thu, 16 Oct 2025 08:30:00 +0000

Type Values Removed Values Added
Description Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the RelayState
Title Arbitrary Mattermost Team can be joined by manipulating the SAML RelayState
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2025-10-16T15:36:37.084Z

Reserved: 2025-09-16T08:32:57.321Z

Link: CVE-2025-58075

cve-icon Vulnrichment

Updated: 2025-10-16T13:31:26.087Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-16T09:15:35.030

Modified: 2025-10-16T15:28:59.610

Link: CVE-2025-58075

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.