CVE-2026-22892 — Incorrect Authorization in Mattermost Mattermost-server

CWE-863 — Incorrect Authorization6 documents5 sources
Severity
4.3MEDIUMNVD
EPSS
0.0%
top 99.06%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Github.com Mattermost Mattermost-serverMattermost ServerMattermost
Timeline
PublishedFeb 13
Latest updateFeb 23

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NExploitability: 2.8 | Impact: 1.4

Affected Packages3 packages

▶NVDmattermost/mattermost_server10.11.0 — 10.11.10+2
▶CVEListV5mattermost/mattermost11.1.0 — 11.1.2+2

🔴Vulnerability Details

4
OSV
Mattermost doesn't validate user permissions when creating Jira issues from Mattermost posts in github.com/mattermost/mattermost-server↗2026-02-23
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CVEList
Insufficient Authorization in Mattermost Jira Plugin Allows Unauthorized Access to Post Attachments↗2026-02-13
▶
OSV
Mattermost doesn't validate user permissions when creating Jira issues from Mattermost posts↗2026-02-13
▶
GHSA
Mattermost doesn't validate user permissions when creating Jira issues from Mattermost posts↗2026-02-13
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-22892 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-22892 — Incorrect Authorization | cvebase