CVE-2026-6541
Published:July 13, 2026
Updated:July 21, 2026
Mattermost versions 11.7.x <= 11.7.1, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict metric configuration changes to the playbook being saved, which allows an authenticated user with team access to alter another user’s playbook metric settings via a crafted import or update request with a foreign metric ID. Mattermost Advisory ID: MMSA-2026-00653
Affected Packages
https://github.com/mattermost/mattermost-plugin-playbooks.git (GITHUB):
Affected version(s) >=v2.0.0 <v2.9.0Fix Suggestion:
Update to version v2.9.0github.com/mattermost/mattermost-plugin-playbooks (GO):
Affected version(s) >=v1.41.1-0.20250408163728-664fe36f335a <v1.41.1-0.20260507212919-da4c39fc2520Fix Suggestion:
Update to version v1.41.1-0.20260507212919-da4c39fc2520Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Authorization Bypass Through User-Controlled Key
EPSS
Base Score:
0.15