CVE-2013-4366

9.8 CRITICAL

Published: October 30, 2017 Modified: May 13, 2026

Description

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

http://svn.apache.org/r1528614

Source: secalert@redhat.com

Issue Tracking Patch Release Notes Vendor Advisory

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

Source: secalert@redhat.com

Issue Tracking Release Notes Vendor Advisory

http://svn.apache.org/r1528614

Source: af854a3a-2127-422b-91ae-364da2661108

Issue Tracking Patch Release Notes Vendor Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

Issue Tracking Release Notes Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.8 / 10.0

EPSS (Exploit Probability)

2.2%

80th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-20

Affected Vendors

apache

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