CVE-2026-0998 — Mattermost Zoom Plugin allows unauthorized meeting creation and post modification via insufficient API access controls

CVE-2026-0998

Mattermost Zoom Plugin allows unauthorized meeting creation and post modification via insufficient API access controls PUBLISHED

Description (CNA)

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

Affected (CNA)

Vendor / product	Versions
Mattermost / Mattermost	affected 11.1.0 through 11.1.2; affected 10.11.0 through 10.11.9; affected 11.2.0 through 11.2.1; unaffected 11.3.0; unaffected 11.1.3; unaffected 10.11.10; unaffected 11.2.2

CWE

CWE-862

References

https://mattermost.com/security-updates

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.