CVE-2026-22892

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

State: Published
Severity: 4.3 Medium
Published: Feb 13, 2026
Updated: Feb 13, 2026
Reserved: Jan 15, 2026

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

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	Mattermost

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
MattermostMattermost	11.1.0 through 11.1.2Affected 10.11.0 through 10.11.9Affected 11.2.0 through 11.2.1Affected 11.3.0Not affected 11.1.3Not affected 10.11.10Not affected 11.2.2Not affected

References

MMSA-2025-00550vendor-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.