CVE-2026-22892 — Insufficient Authorization in Mattermost Jira Plugin Allows Unauthorized Access to Post Attachments

CVE-2026-22892

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

Description (CNA)

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

Affected (CNA)

Vendor / product	Versions
Mattermost / Mattermost	affected 11.1.0 through 11.1.2; affected 10.11.0 through 10.11.9; affected 11.2.0 through 11.2.1; unaffected 11.3.0; unaffected 11.1.3; unaffected 10.11.10; unaffected 11.2.2

CWE

CWE-863

References

https://mattermost.com/security-updates

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.