Vulnerability DatabaseCVE-2026-6341
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CVE-2026-6341
Published:May 18, 2026
Updated:June 11, 2026
Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to have API-level checks on which groups the user can create issues or attach comments to which allows a user that is member of multiple groups to create issues to a locked group via direct API requests. Mattermost Advisory ID: MMSA-2026-00602
Affected Packages
https://github.com/mattermost/mattermost-plugin-gitlab.git (GITHUB):
Affected version(s) >=v1.0.0 <v1.12.1
Fix Suggestion:
Update to version v1.12.1
github.com/mattermost/mattermost-plugin-gitlab (GO):
Affected version(s) >=v1.0.0 <v1.12.1
Fix Suggestion:
Update to version v1.12.1
Related Resources (1)
https://mattermost.com/security-updates
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CVSS 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)
Incorrect Authorization
CWE-863
EPSS
Base Score:
0.03