CVE-2026-22892CWE-863

Insufficient Authorization in Mattermost Jira Plugin Allows Unauthorized Access to Post Attachments

Medium · published February 13, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
18.0
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00269 · 18.0th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-02-13T10:29Z
EPSS history
Timeline
  • 13 FEB 10:29Z
    Insufficient Authorization in Mattermost Jira Plugin Allows Unauthorized Access to Post Attachments
    cvelistv5