Vulnerability Description
libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks.
CVSS Score
6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Curl | >= 8.8.0, < 8.14.0 |
Related Weaknesses (CWE)
References
- https://curl.se/docs/CVE-2025-4947.htmlPatchVendor Advisory
- https://curl.se/docs/CVE-2025-4947.jsonVendor Advisory
- https://hackerone.com/reports/3150884ExploitIssue TrackingPatch
- http://www.openwall.com/lists/oss-security/2025/05/28/4Mailing ListPatchThird Party Advisory
FAQ
What is CVE-2025-4947?
CVE-2025-4947 is a vulnerability with a CVSS score of 6.5 (MEDIUM). libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-midd...
How severe is CVE-2025-4947?
CVE-2025-4947 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-4947?
Check the references section above for vendor advisories and patch information. Affected products include: Haxx Curl.