CVE-2011-5239: Civicrm

Medium severity, CVSS 5.8. EPSS: 0.5% chance of exploitation in the next 30 days.

CiviCRM 4.0.5 and 4.1.1 does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

Affected products

• Civicrm Civicrm: version 4.0.5 only; version 4.1.1 only

Published 2012-11-06. Last modified 2026-06-16.