GHSA-PCRH-GJ77-J4MW Concrete CMS is vulnerable to Stored XSS via external-link page cvName

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

Cross-site Scripting (XSS)

Overview concrete5/concrete5 is a concrete5 open source CMS. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the updateCollectionAliasExternal process. An attacker can execute arbitrary JavaScript code in the context of a user's browser by submitting crafted input...

CVE-2026-8139 Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via external-link page cvName

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...

CVE-2026-8139

Concrete CMS versions 9.5.0 and earlier are vulnerable to stored XSS on the external-link page cvName due to updateCollectionAliasExternal bypassing sanitization. The issue is triggered by the sanitize bypass in updateCollectionAliasExternal, enabling stored scripts delivered to users. Affected p...

CVE-2026-8139 Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via external-link page cvName

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...