What is GHSA-pcrh-gj77-j4mw?

GHSA-pcrh-gj77-j4mw is a security advisory published by GitHub Security Advisories with Low severity. Concrete CMS is vulnerable to Stored XSS via external-link page cvName

Which CVE IDs does GHSA-pcrh-gj77-j4mw cover?

GHSA-pcrh-gj77-j4mw covers the following CVE IDs: CVE-2026-8139. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-pcrh-gj77-j4mw?

GHSA-pcrh-gj77-j4mw affects 1 product, including: composer/concrete5/concrete5:\u003c 9.5.1.

GHSA-pcrh-gj77-j4mwLow

Concrete CMS is vulnerable to Stored XSS via external-link page cvName

Vendor

GitHub Security Advisories

Published

May 22, 2026

Last Modified

June 24, 2026

🔗 CVE IDs covered (1)

CVE-2026-8139 →

📋 Description

Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via external-link page cvName because updateCollectionAliasExternal bypasses being sanitized.

🎯 Affected products1

composer/concrete5/concrete5:< 9.5.1

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-8139
https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes
https://github.com/advisories/GHSA-pcrh-gj77-j4mw