CVE-2014-4172: Apereo .net Cas Client

Critical severity, CVSS 9.8. EPSS: 6.1% chance of exploitation in the next 30 days.

A URL parameter injection vulnerability was found in the back-channel ticket validation step of the CAS protocol in Jasig Java CAS Client before 3.3.2, .NET CAS Client before 1.0.2, and phpCAS before 1.3.3 that allow remote attackers to inject arbitrary web script or HTML via the (1) service parameter to validation/AbstractUrlBasedTicketValidator.java or (2) pgtUrl parameter to validation/Cas20ServiceTicketValidator.java.

Affected products

• Apereo .net Cas Client: before 1.0.2 (fixed in 1.0.2)
• Apereo Java Cas Client: before 3.3.2 (fixed in 3.3.2)
• Apereo Phpcas: before 1.3.3 (fixed in 1.3.3)
• Debian Debian Linux: version 7.0 only
• Fedoraproject Fedora: version 20 only

Published 2020-01-24. Last modified 2026-06-17.