CVE-2026-2461
March 16, 2026
Mattermost Plugins versions <=11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members. Mattermost Advisory ID: MMSA-2025-00559
Affected Packages
https://github.com/mattermost/mattermost-plugin-boards.git (GITHUB):
Affected version(s) >=v8.0.0 <v9.2.2Fix Suggestion:
Update to version v9.2.2github.com/mattermost/mattermost-plugin-boards (GO):
Affected version(s) >=v0.0.0-20250122103535-025ce8d363a0 <v0.0.0-20260108044135-57c5be5b6ef5Fix Suggestion:
Update to version v0.0.0-20260108044135-57c5be5b6ef5github.com/mattermost/mattermost-plugin-boards (GO):
Affected version(s) >=v8.0.0 <v9.2.2Fix Suggestion:
Update to version v9.2.2Related Resources (5)
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:
0.03
