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 user identity and post ownership in the {{/api/v1/askPMI}} endpoint which allows unauthorized users to start Zoom meetings as any user and overwrite arbitrary posts via direct API calls with manipulated user IDs and post data.. Mattermost Advisory ID: MMSA-2025-00534
References
History

Wed, 18 Feb 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost mattermost Server
Mattermost zoom
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
cpe:2.3:a:mattermost:zoom:*:*:*:*:*:mattermost:*:*
Vendors & Products Mattermost mattermost Server
Mattermost zoom

Tue, 17 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 16 Feb 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost
Vendors & Products Mattermost
Mattermost mattermost

Mon, 16 Feb 2026 10:15:00 +0000

Type Values Removed Values Added
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 user identity and post ownership in the {{/api/v1/askPMI}} endpoint which allows unauthorized users to start Zoom meetings as any user and overwrite arbitrary posts via direct API calls with manipulated user IDs and post data.. Mattermost Advisory ID: MMSA-2025-00534
Title Mattermost Zoom Plugin allows unauthorized meeting creation and post modification via insufficient API access controls
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2026-02-16T09:54:24.732Z

Updated: 2026-02-17T15:00:44.691Z

Reserved: 2026-01-15T15:58:22.233Z

Link: CVE-2026-0998

cve-icon Vulnrichment

Updated: 2026-02-17T15:00:41.277Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-16T10:16:07.983

Modified: 2026-02-18T20:22:51.917

Link: CVE-2026-0998

cve-icon Redhat

No data.