CVE-2025-13767 — Unauthorized Read Access to Private Channel Posts via Mattermost Jira Plugin
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comme…
Published: 2025-12-24 · CVSS: 4.3 · CVSS 3.1
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comments to Jira issues, 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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7