CVE-2026-0997: Mattermost Zoom Plugin channel preference API lacks authorization checks
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 and Mattermost Plugin Zoom versions <=1.11.0 fail to validate the authenticated user when processing {{/plugins/zoom/api/v1/channel-preference}}, which allows any logged-in user to change Zoom meeting restrictions for arbitrary channels via crafted API requests.. Mattermost Advisory ID: MMSA-2025-00558
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2026-0997?
CVE-2026-0997 has been classified as a high severity vulnerability due to its potential for unauthorized access to user preferences.
How do I fix CVE-2026-0997?
To fix CVE-2026-0997, upgrade Mattermost to version 11.1.3 or later, 10.11.10 or later, or 11.2.2 or later, and ensure Plugin Zoom is updated to version 1.11.1 or later.
What versions of Mattermost are affected by CVE-2026-0997?
CVE-2026-0997 affects Mattermost versions 11.1.x up to 11.1.2, 10.11.x up to 10.11.9, and 11.2.x up to 11.2.1.
What versions of Mattermost Plugin Zoom are impacted by CVE-2026-0997?
CVE-2026-0997 impacts Mattermost Plugin Zoom versions up to and including 1.11.0.
What issue does CVE-2026-0997 exploit in Mattermost?
CVE-2026-0997 exploits the lack of authorization checks in the channel preference API, allowing unauthorized users access.