What is GHSA-pcrh-gj77-j4mw?

GHSA-pcrh-gj77-j4mw is a security advisory published by GitHub Security Advisories with Low severity. Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via external-link page cvName because...

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.

GHSA-pcrh-gj77-j4mwLow

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

Vendor

GitHub Security Advisories

Published

May 22, 2026

Last Modified

May 22, 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. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.0 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.

🔗 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