CVE-2026-22892

MEDIUM

Mattermost-server < 11.2.2 - Incorrect Authorization

Title source: rule

Description

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to validate user permissions when creating Jira issues from Mattermost posts, which allows an authenticated attacker with access to the Jira plugin to read post content and attachments from channels they do not have access to via the /create-issue API endpoint by providing the post ID of an inaccessible post.. Mattermost Advisory ID: MMSA-2025-00550

References (1)

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

Scores

CVSS v3 4.3

EPSS 0.0001

EPSS Percentile 0.7%

Attack Vector NETWORK

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

Classification

CWE

CWE-863

Status published

Affected Products (2)

mattermost/mattermost-server < 11.2.2Go

mattermost/mattermost_server < 10.11.10

Timeline

Published Feb 13, 2026

Tracked Since Feb 18, 2026