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Status published
Medium
CVE-2025-12756
Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion
Vulnerability Description
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- daynight
References
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Affected Vendor
Mattermost
View all reports →Affected Software
Mattermost
Vulnerable Versions:
11.0.0, 10.12.0, 10.11.0, 10.5.0, 11.1.0, 11.0.3, 10.12.2, 10.11.5, 10.5.13
Timeline
Official Publish:
December 1st, 2025
Last Modified:
December 1st, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N