What is GHSA-x3f7-3cx7-2cw7?

GHSA-x3f7-3cx7-2cw7 is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost Plugins versions \u003c=11.5 11.1.5 10.13.11 11.3.4.0 fail to appropriately check for valid...

Which CVE IDs does GHSA-x3f7-3cx7-2cw7 cover?

GHSA-x3f7-3cx7-2cw7 covers the following CVE IDs: CVE-2026-6342. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-x3f7-3cx7-2cw7?

GHSA-x3f7-3cx7-2cw7 has a CVSS v3 base score of 4.3, published by GitHub Security Advisories.

GHSA-x3f7-3cx7-2cw7MediumCVSS 4.3

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to appropriately check for valid...

Vendor

GitHub Security Advisories

Published

May 18, 2026

Last Modified

May 18, 2026

🔗 CVE IDs covered (1)

CVE-2026-6342 →

📋 Description

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to appropriately check for valid namespaces which allows plugin users to create subscriptions to groups that were not whitelisted via creating groups that share the same prefix as a whitelisted group. Mattermost Advisory ID: MMSA-2026-00601

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-6342
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-x3f7-3cx7-2cw7