What is GHSA-w9qg-chfh-g3q9?

GHSA-w9qg-chfh-g3q9 is a security advisory published by GitHub Security Advisories with Medium severity. Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

Which CVE IDs does GHSA-w9qg-chfh-g3q9 cover?

GHSA-w9qg-chfh-g3q9 covers the following CVE IDs: CVE-2026-3242. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-w9qg-chfh-g3q9?

GHSA-w9qg-chfh-g3q9 has a CVSS v3 base score of 4.8, published by GitHub Security Advisories.

Which products are affected by GHSA-w9qg-chfh-g3q9?

GHSA-w9qg-chfh-g3q9 affects 1 product, including: composer/concrete5/concrete5:\u003c 9.4.8.

GHSA-w9qg-chfh-g3q9MediumCVSS 4.8

Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

Vendor

GitHub Security Advisories

Published

March 4, 2026

Last Modified

March 4, 2026

🔗 CVE IDs covered (1)

CVE-2026-3242 →

📋 Description

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block.

The Concrete CMS security team gave thanks M3dium for reporting.

🎯 Affected products1

composer/concrete5/concrete5:< 9.4.8

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-3242
https://github.com/concretecms/concretecms/pull/12826
https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes
https://github.com/advisories/GHSA-w9qg-chfh-g3q9