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The vulnerability of the PSL validation mechanism in the Apache HttpClient client module of Apache HttpComponents allows a attacker to perform a CSRF attack.

🗓️ 28 Apr 2025 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 16 Views

The PSL validation flaw in Apache HttpClient enables CSRF via certificate authentication errors.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: A bug in PSL validation logic in Apache HttpClient 5.4.x disables domain checks, which affects IBM watsonx.data
1 Sep 202514:52
–ibm
IBM Security Bulletins		Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to an Improper Access Control vulnerability in Apache HttpClient [CVE-2025-27820]
28 Aug 202517:04
–ibm
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite Ai-Service Component uses A bug in PSL validation logic in Apache HttpClient 5.4.x disables domain checks, affecting cookie management and host name verification. Discovered by the Apache HttpClient team.
9 May 202509:06
–ibm
IBM Security Bulletins		Security Bulletin: IBM watsonx Orchestrate Cartridge affected by vulnerability in httpclient5-5.4.2.jar
11 Jul 202511:33
–ibm
Atlassian		Third-Party Dependency in Bamboo Data Center and Server
8 Jul 202505:09
–atlassian
Atlassian		MITM (Man-in-the-Middle) org.apache.httpcomponents.client5:httpclient5 Dependency in Confluence Data Center and Server
2 Jul 202504:09
–atlassian
Atlassian		MITM (Man-in-the-Middle) org.apache.httpcomponents.client5:httpclient5 Dependency in Jira Software Data Center and Server
5 Jul 202505:09
–atlassian
Chainguard		CVE-2025-27820 vulnerabilities
26 Apr 202501:14
–cgr
Circl		CVE-2025-27820
24 Apr 202512:06
–circl
CNNVD		Apache HttpClient 安全漏洞
24 Apr 202500:00
–cnnvd
Rows per page
Vulners
Node
apachehttpclientRange<5.4.3

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28 Apr 2025 00:00Current
7High risk
Vulners AI Score7
CVSS 37.5
CVSS 27.8
EPSS0.00716
Public Suffix ListHttp ClientCSRF attackcertificate authenticationremote exploit
16