CVE-2025-12756

MEDIUM

Mattermost <11.0.2-10.12.1-10.11.4-10.5.12 - Privilege Escalation

Title source: llm

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.

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 4.3

EPSS 0.0003

EPSS Percentile 10.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-863

Status published

Products (3)

mattermost/mattermost 0Go

mattermost/mattermost 10.11.0Go

mattermost/mattermost_server 10.5.0 - 10.5.13

Published Dec 01, 2025

Tracked Since Feb 18, 2026