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...

EUVD-2026-31380

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...

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 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 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...

PT-2026-42581

Name of the Vulnerable Software and Affected Versions Concrete CMS versions prior to 9.5.1 Description Stored Cross-Site Scripting XSS occurs via the 'external-link' page cvName because the updateCollectionAliasExternal function bypasses sanitization. Stored XSS is a flaw where malicious scripts...

CVE-2026-8139: Improper Neutralization of Input During Web Page Generation

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...