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Apache HttpClient disables domain checks

High severity GitHub Reviewed Published Apr 24, 2025 to the GitHub Advisory Database • Updated Apr 24, 2025

Package

maven org.apache.httpcomponents.client5:httpclient5 (Maven)

Affected versions

>= 5.4-alpha1, < 5.4.3

Patched versions

5.4.3

Description

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. Fixed in the 5.4.3 release.

References

Published by the National Vulnerability Database Apr 24, 2025
Published to the GitHub Advisory Database Apr 24, 2025
Reviewed Apr 24, 2025
Last updated Apr 24, 2025

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS score

Weaknesses

CVE ID

CVE-2025-27820

GHSA ID

GHSA-73m2-qfq3-56cx

Source code

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