CVE-2011-5255: x3cms x3 CMS

Medium severity, CVSS 4.3. EPSS: 1.7% chance of exploitation in the next 30 days.

Multiple cross-site scripting (XSS) vulnerabilities in admin/login in X3 CMS 0.4.3.1 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) PATH_INFO, (2) username, or (3) password parameter.

Affected products

• x3cms x3 CMS: up to and including 0.4.3.1; version 0.4 only; version 0.4.0.3 only; version 0.4.1 only; version 0.4.2 only; version 0.4.2.1 only

Published 2013-01-31. Last modified 2026-06-16.