CVE-2011-4813: Whmcs Whmcompletesolution

Medium severity, CVSS 5.0. EPSS: 2.9% chance of exploitation in the next 30 days.

Directory traversal vulnerability in clientarea.php in WHMCompleteSolution (WHMCS) 3.x.x allows remote attackers to read arbitrary files via an invalid action and a ../ (dot dot slash) in the templatefile parameter.

Affected products

• Whmcs Whmcompletesolution: version 3.0.0 only

Published 2011-12-14. Last modified 2026-06-16.