CVE-2026-0997

MEDIUM

Mattermost 11.1.x-11.1.2 - Privilege Escalation

Title source: llm

Description

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 and Mattermost Plugin Zoom versions <=1.11.0 fail to validate the authenticated user when processing {{/plugins/zoom/api/v1/channel-preference}}, which allows any logged-in user to change Zoom meeting restrictions for arbitrary channels via crafted API requests.. Mattermost Advisory ID: MMSA-2025-00558

References (1)

[Various Sources] https://mattermost.com/security-updates

Scores

CVSS v3 4.3

EPSS 0.0003

EPSS Percentile 8.6%

Attack Vector NETWORK

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

Classification

CWE

CWE-863

Status published

Affected Products (3)

mattermost/mattermost_server < 10.11.10

mattermost/zoom < 1.11.0

mattermost/mattermost-plugin-zoom < 1.11.0Go

Timeline

Published Feb 16, 2026

Tracked Since Feb 18, 2026