CVE-2025-27820
HIGHCVSS 7.5/10EPSS 0.74%
Last modified
CVE-2025-27820 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.74% chance of exploitation in the next 30 days.
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
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Httpclient | >= 5.4, < 5.4.3 |
| Netapp | Ontap Tools | 10 |
References
- https://github.com/apache/httpcomponents-client/pull/574Issue Tracking, Patch
- https://github.com/apache/httpcomponents-client/pull/621Issue Tracking, Patch
- https://lists.apache.org/thread/55xhs40ncqv97qvoocok44995xp5kqn8Mailing List, Patch
- https://security.netapp.com/advisory/ntap-20250516-0003/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-27820?
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
How severe is CVE-2025-27820?
CVE-2025-27820 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.
How do I fix CVE-2025-27820?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2025-27820?
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Scan your code nowSource: NVD / NIST