No exploitation reportedFix available

CVE-2014-4172

Q: Is CVE-2014-4172 actively exploited?

Active exploitation of CVE-2014-4172 has not been confirmed. Its EPSS score was 6.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2014-4172?

CVE-2014-4172 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2020-01-24
Fixed in1.0.2
WeaknessCWE-74

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2020-01-2419:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2014-4172?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2014-4172?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apereo .net cas client

Branch	Affected	Fixed in	Source
1.0	< 1.0.2	1.0.2	NVD

Apereo java cas client

Branch	Affected	Fixed in	Source
3.3	< 3.3.2	3.3.2	NVD

Apereo phpcas

Branch	Affected	Fixed in	Source
1.3	< 1.3.3	1.3.3	NVD

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Apereo .net cas client to 1.0.2

Advisories and patches

github.comPatch
github.comPatch
github.comRelease Notes

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-74read 2026-10-23
FIRST EPSSEPSS score6.1 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2020-01-24
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2014-4172?

Is CVE-2014-4172 actively exploited?

Active exploitation of CVE-2014-4172 has not been confirmed. Its EPSS score was 6.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2014-4172?

CVE-2014-4172 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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