CVE-2026-0997
Received Received - Intake
Authorization Bypass in Mattermost Zoom Plugin Allows Privilege Escalation

Publication date: 2026-02-16

Last updated on: 2026-02-18

Assigner: Mattermost, Inc.

Description
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
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Meta Information
Published
2026-02-16
Last Modified
2026-02-18
Generated
2026-06-16
AI Q&A
2026-02-16
EPSS Evaluated
2026-06-14
NVD
CVE-2026-0997
EUVD
EUVD-2026-6099
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
mattermost mattermost_server From 10.11.0 (inc) to 10.11.10 (exc)
mattermost mattermost_server From 11.2.0 (inc) to 11.2.2 (exc)
mattermost mattermost_server From 11.1.0 (inc) to 11.1.3 (exc)
mattermost zoom to 1.11.0 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
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Executive Summary

This vulnerability exists in certain versions of Mattermost and the Mattermost Plugin Zoom. It occurs because the system fails to properly validate the authenticated user when processing requests to the endpoint {{/plugins/zoom/api/v1/channel-preference}}. As a result, any logged-in user can exploit this flaw by sending crafted API requests to change Zoom meeting restrictions for arbitrary channels.

Impact Analysis

The vulnerability allows any authenticated user to modify Zoom meeting restrictions on channels they may not have permission to control. This could lead to unauthorized changes in meeting settings, potentially disrupting meetings or exposing meetings to unintended participants.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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