CVE-2014-4172

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: 2020-01-24 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-4172 is rated High Risk (66.5/100): CVSS Critical severity, with high exploitation likelihood (EPSS 6.06%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2014-4172

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 12.68% 6.06% -6.62%
2 2026-04-22 6.74% 12.68% +5.93%
3 2025-03-30 — 6.74% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-4172

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2014-4172

GitHub Security Advisory for CVE-2014-4172

GHSA-9fc5-q25c-r2wr · Severity: critical · Ecosystem: nuget — Jasig Java CAS Client, .NET CAS Client, and phpCAS contain URL parameter injection vulnerability

OS Trackers for CVE-2014-4172

vendor priority summary link
debian not yet assigned CVE-2014-4172 not yet assigned priority: Debian including 1 source packages (php-cas), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2014-4172
redhat high — https://access.redhat.com/security/cve/CVE-2014-4172
ubuntu medium CVE-2014-4172 medium priority: Ubuntu including 1 source packages (php-cas), 14 status rows across 14 suites (artful, bionic, cosmic, disco, lucid, precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 6, not-affected 4, DNE 3, released 1. https://ubuntu.com/security/CVE-2014-4172

Affected software / configurations for CVE-2014-4172

Vendor Product Version Raw CPE
apereo .net_cas_client < 1.0.2 cpe:2.3:a:apereo:.net_cas_client:*:*:*:*:*:*:*:*
apereo java_cas_client < 3.3.2 cpe:2.3:a:apereo:java_cas_client:*:*:*:*:*:*:*:*
apereo phpcas < 1.3.3 cpe:2.3:a:apereo:phpcas:*:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
fedoraproject fedora 20 cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:*

References for CVE-2014-4172

URL Tags
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
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