CVE-2025-12756

Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion

State: Published
Severity: 4.3 Medium
Published: Dec 1, 2025
Updated: Dec 1, 2025
Reserved: Nov 5, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N	Mattermost

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
MattermostMattermost	11.0.0 through 11.0.2Affected 10.12.0 through 10.12.1Affected 10.11.0 through 10.11.4Affected 10.5.0 through 10.5.12Affected 11.1.0Not affected 11.0.3Not affected 10.12.2Not affected 10.11.5Not affected 10.5.13Not affected

References

https://mattermost.com/security-updates

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