Mattermost Zoom Plugin: Auth Bypass Allows Channel Preference Change (11.2.1)
CVE-2026-0997 Published on February 16, 2026
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
Vulnerability Analysis
CVE-2026-0997 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-0997 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-0997
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Affected Versions
Mattermost:- Version 11.1.0, <= 11.1.2 is affected.
- Version 10.11.0, <= 10.11.9 is affected.
- Version 11.2.0, <= 11.2.1 is affected.
- Version 11.3.0 is unaffected.
- Version 11.1.3 is unaffected.
- Version 10.11.10 is unaffected.
- Version 11.2.2 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.