High severity · published Apr 24, 2025
CVE-2025-27820
Apache HttpComponents: PSL (Public Suffix List) validation bypass
7.5
CVSS
1%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AH
Apache HttpComponents · Apache Software Foundation
5.4.0 before 5.4.3 · source: vendor
HT
Httpclient · Apache
5.4 before 5.4.3 · source: NVD
OT
Ontap Tools · Netapp
10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-27820
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-27820
Issue Tracking
https://github.com/apache/httpcomponents-client/pull/574
Issue Tracking
https://github.com/apache/httpcomponents-client/pull/621
Product
https://hc.apache.org/httpcomponents-client-5.4.x/index.html
Mailing List
https://lists.apache.org/thread/55xhs40ncqv97qvoocok44995xp5kqn8
Third Party Advisory
https://security.netapp.com/advisory/ntap-20250516-0003/