CVE-2026-0998

published 2026-02-16

CVE-2026-0998: 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…

medium 4.3 CVSS 3.1

AV N AC L PR L UI N S U C N I L A N

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

8 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost-plugin-zoom	>= 0 < 1.12.0	1.12.0
mattermost	mattermost	10.11.0 – 10.11.9	—
mattermost	mattermost	11.1.0 – 11.1.2	—
mattermost	mattermost	11.2.0 – 11.2.1	—
mattermost	mattermost_server	>= 10.11.0 < 10.11.10	10.11.10
mattermost	mattermost_server	>= 11.1.0 < 11.1.3	11.1.3
mattermost	mattermost_server	>= 11.2.0 < 11.2.2	11.2.2
mattermost	zoom	<= 1.11.0	—

CWE-862