CVE-2014-4172

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 6.1% (93rd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 6.1%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
51
EG Risk 51/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation6% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
6.1%
EPSS %ILE
93rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

January 24, 2020

Last Modified

November 21, 2024

Advisory Details (9)

Auto-updated Oct 7, 2026
Patch available. Sources: redhat, github_commit, github_pr.
generic

[SECURITY] [DSA 3017-1] php-cas security update

https://www.debian.org/security/2014/dsa-3017.en.html
generic

Jira

https://issues.jasig.org/browse/CASC-228
github_pr

URL Encode ticket parameter when presented for validation.

Fix merged in Jasig/phpCAS PR #125 on 2014-07-02 — awaiting tagged release

https://github.com/Jasig/phpCAS/pull/125
generic

phpCAS/docs/ChangeLog at master · apereo/phpCAS · GitHub

https://github.com/Jasig/phpCAS/blob/master/docs/ChangeLog
github_commit

commit ae37092100c8 (Jasig/java-cas-client)

Fix landed in Jasig/java-cas-client commit ae37092100c8 — awaiting tagged release

https://github.com/Jasig/java-cas-client/commit/ae37092100c8eaec610dab6d83e5e05a8ee58814
github_commit Patch Available

commit f0e030014fb7 (Jasig/dotnet-cas-client)

Patch available: Jasig/dotnet-cas-client v1.0.2 (contains commit f0e030014fb7)

https://github.com/Jasig/dotnet-cas-client/commit/f0e030014fb7a39e5f38469f43199dc590fd0e8d
generic

IBM X-Force Exchange

https://exchange.xforce.ibmcloud.com/vulnerabilities/95673
redhatMentions a patch (unverified)

1131350 – (CVE-2014-4172) CVE-2014-4172 cas-client: Bypass of security constraints via URL parameter injection

https://bugzilla.redhat.com/show_bug.cgi?id=1131350
genericMentions a patch (unverified)

#759718 - php-cas needs to urlencode all tickets (CVE-2014-4172) - Debian Bug report logs

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=759718

Vendor Advisories for CVE-2014-4172(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatcas-client2015-05-14redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(8 across 8 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
php-cas—
  • every version up to 1.3.3-1: fixed in 1.3.3-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
php-cas—
  • every version up to 1.3.3-1: fixed in 1.3.3-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
php-cas—
  • every version up to 1.3.3-1: fixed in 1.3.3-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
php-cas—
  • every version up to 1.3.3-1: fixed in 1.3.3-1
—
Debian:7(1)
PackageVulnerable rangeFix by version rangeDependents
php-cas1.3.1-4
  • every version up to 1.3.1-4+deb7u1: fixed in 1.3.1-4+deb7u1
—
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
org.jasig.cas:cas-client3.0 ... 3.1.9 (21 versions)
  • every version up to 3.3.2: fixed in 3.3.2
—
NuGet(1)
PackageVulnerable rangeFix by version rangeDependents
DotNetCasClient1.0.0, 1.0.1
  • every version up to 1.0.2: fixed in 1.0.2
—
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
jasig/phpcas—
  • every version up to 1.3.3: fixed in 1.3.3
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 144 total refreshes for this CVE.

  1. 2026-10-09 20:01 UTCEPSS rescore
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Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2014-4172?
CVE-2014-4172 is a critical vulnerability published on January 24, 2020. 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…
When was CVE-2014-4172 disclosed?
CVE-2014-4172 was first published on January 24, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2014-4172 actively exploited?
CVE-2014-4172 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.1% probability of exploitation in the next 30 days (93rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2014-4172?
CVE-2014-4172 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2014-4172?
A fix for CVE-2014-4172 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2014-4172 are linked in the Vendor Advisories panel on this page.

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