What is GHSA-w65c-fvp5-fvc5?

GHSA-w65c-fvp5-fvc5 is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost Plugin Zoom fail to validate user identity and post ownership in the {{/api/v1/askPMI}} endpoint

Which CVE IDs does GHSA-w65c-fvp5-fvc5 cover?

GHSA-w65c-fvp5-fvc5 covers the following CVE IDs: CVE-2026-0998. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-w65c-fvp5-fvc5?

GHSA-w65c-fvp5-fvc5 has a CVSS v3 base score of 4.3, published by GitHub Security Advisories.

Which products are affected by GHSA-w65c-fvp5-fvc5?

GHSA-w65c-fvp5-fvc5 affects 1 product, including: go/github.com/mattermost/mattermost-plugin-zoom:\u003c 1.12.0.

GHSA-w65c-fvp5-fvc5MediumCVSS 4.3

Mattermost Plugin Zoom fail to validate user identity and post ownership in the {{/api/v1/askPMI}} endpoint

Vendor

GitHub Security Advisories

Published

February 16, 2026

Last Modified

February 19, 2026

🔗 CVE IDs covered (1)

CVE-2026-0998 →

📋 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

🎯 Affected products1

go/github.com/mattermost/mattermost-plugin-zoom:< 1.12.0

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-0998
https://mattermost.com/security-updates
https://github.com/mattermost/mattermost-plugin-zoom/commit/a8b58c43625ab25746e451acc4f71515d52c8122
https://github.com/advisories/GHSA-w65c-fvp5-fvc5