Vulnerability · Published Feb 16, 2026 · Assigned by Mattermost

CVE-2026-0997Mattermost Zoom Plugin channel preference API lacks authorization checks

Medium 4.3

In plain English

A medium-severity incorrect authorization in Mattermost from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.2%top 92.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/mattermost/mattermost-plugin-zoom	1.11.0	GHSA-2phx-frhf-xr55
Go	github.com/mattermost/mattermost-plugin-zoom	1.11.0	GO-2026-4519

Affected products (as reported)

Vendor	Product	Versions
Mattermost	Mattermost	11.1.0 – through 11.1.210.11.0 – through 10.11.911.2.0 – through 11.2.1

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

MMSA-2025-00558 vendor-advisory