Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run.
Advisories
Source ID Title
EUVD EUVD EUVD-2025-18757 Mattermost allows an unauthorized Guest user access to Playbook
Github GHSA Github GHSA GHSA-4578-6gjh-f2jm Mattermost allows an unauthorized Guest user access to Playbook
Fixes

Solution

Update Mattermost to versions 10.9.0, 10.5.6, 9.11.16, 10.8.1, 10.7.3, 10.6.6 or higher.


Workaround

No workaround given by the vendor.

References
History

Tue, 08 Jul 2025 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:10.8.0:-:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc3:*:*:*:*:*:*
Vendors & Products Mattermost
Mattermost mattermost Server

Mon, 23 Jun 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Fri, 20 Jun 2025 14:45:00 +0000

Type Values Removed Values Added
Description Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run.
Title Unauthorized Guest user access to Playbook
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: 2025-06-23T20:45:21.017Z

Reserved: 2025-04-03T15:36:57.160Z

Link: CVE-2025-3228

cve-icon Vulnrichment

Updated: 2025-06-23T20:45:15.312Z

cve-icon NVD

Status : Analyzed

Published: 2025-06-20T15:15:20.573

Modified: 2025-07-08T14:30:48.667

Link: CVE-2025-3228

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-06-23T08:20:14Z