CVE-2014-4172

CRITICAL

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.

Published: Jan 24, 2020 Modified: Jun 17, 2026

CWE-74

CVSS Metrics

CVSSv3

Attack Vector: NETWORK Attack Complexity: LOW Privileges Required: NONE User Interaction: NONE Scope: UNCHANGED Confidentiality Impact: HIGH Integrity Impact: HIGH Availability Impact: HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products (5)

Vendor	Product	Version
apereo	.net_cas_client	* < 1.0.2
apereo	java_cas_client	* < 3.3.2
apereo	phpcas	* < 1.3.3
debian	debian_linux	7.0
fedoraproject	fedora	20

GitHub Security Advisory GHSA-9fc5-q25c-r2wr

Jasig Java CAS Client, .NET CAS Client, and phpCAS contain URL parameter injection vulnerability

nuget DotNetCasClient < 1.0.2 Fixed: 1.0.2

maven org.jasig.cas:cas-client < 3.3.2 Fixed: 3.3.2

composer jasig/phpcas < 1.3.3 Fixed: 1.3.3

References (22)

http://lists.fedoraproject.org/pipermail/package-announce/2014-August/137182.html Third Party Advisory
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=759718 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1131350 Issue Tracking, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/95673 Third Party Advisory, VDB Entry
https://github.com/Jasig/dotnet-cas-client/commit/f0e030014fb7a39e5f38469f43199dc590fd0e8d Patch, Third Party Advisory
https://github.com/Jasig/java-cas-client/commit/ae37092100c8eaec610dab6d83e5e05a8ee58814 Patch, Third Party Advisory
https://github.com/Jasig/phpCAS/blob/master/docs/ChangeLog Release Notes, Third Party Advisory
https://github.com/Jasig/phpCAS/pull/125 Third Party Advisory
https://issues.jasig.org/browse/CASC-228 Third Party Advisory
https://www.debian.org/security/2014/dsa-3017.en.html Third Party Advisory
https://www.mail-archive.com/cas-user%40lists.jasig.org/msg17338.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/137182.html Third Party Advisory
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=759718 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1131350 Issue Tracking, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/95673 Third Party Advisory, VDB Entry

Risk Scores

CVSS Score 9.8 / 10

EPSS Score 6.06%

Top 7% most likely to be exploited

Threat Score 41 / 100

Data Sources

NVD EPSS GitHub