CVE-2025-3227
June 20, 2025
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 enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public and private channels by manipulating playbook run participants when the run is linked to a channel.
Affected Packages
github.com/mattermost/mattermost (GO):
Affected version(s) >=v9.11.0 <v9.11.16Fix Suggestion:
Update to version v9.11.16github.com/mattermost/mattermost/server/v8 (GO):
Affected version(s) >=v8.0.0-20230429093631-aac4f2337933 <v8.0.0-20250520060012-d0380305ef7aFix Suggestion:
Update to version v8.0.0-20250520060012-d0380305ef7agithub.com/mattermost/mattermost (GO):
Affected version(s) >=v10.7.0 <10.7.3Fix Suggestion:
Update to version 10.7.3github.com/mattermost/mattermost (GO):
Affected version(s) =v10.8.0 <v10.8.1Fix Suggestion:
Update to version v10.8.1github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.5.0 <10.5.6Fix Suggestion:
Update to version 10.5.6github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.6.0 <10.6.5Fix Suggestion:
Update to version 10.6.5Related Resources (3)
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
LOW
Vulnerable System Integrity
NONE
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
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Incorrect Authorization
EPSS
Base Score:
0.06
