Vulnerability Report

CVE-2013-4366

Title: Apache Httpclient Improper Input Validation

Input Validation Error

Proof Of Concept

No public PoC currently indexed for CVE-2013-4366.

CWE Category CWE-20

Published Date Oct 30, 2017

Modified Date May 13, 2026

Exploit Status Not Found

Score 9.8 CVSS v3.1

Exploit Probability (EPSS)

2.18%

Vulnerability Summary

CVE-2013-4366: http/impl/client/HttpClientBuilder.java in Apache HttpClient 4.3.x before 4.3.1 does not ensure that X509HostnameVerifier is not null, which allows attackers to have unspecified impact via vectors involving hostname verification.

Impacted Vendors

apache 1

sensiolabs 1

Reference Links

http://svn.apache.org/r1528614 http://www.apache.org/dist/httpcomponents/httpclient/RELEASE_NOTES-4.3.x.txt http://svn.apache.org/r1528614 http://www.apache.org/dist/httpcomponents/httpclient/RELEASE_NOTES-4.3.x.txt

CVSS v3.1

Source Entity [email protected]

Severity CRITICAL

9.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.5

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns