CVE-2025-4947

MEDIUM
Published May 28, 2025 Modified Jun 26, 2025 CWE-295

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.

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CVSS v3.1 Score

6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Weakness Type (CWE)

CWE-295 CWE-295

Affected Products

Vendor Product
haxx curl

References

Frequently Asked Questions

What is CVE-2025-4947? +
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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2025-4947? +
CVE-2025-4947 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2025-4947? +
CVE-2025-4947 affects products from haxx, specifically: curl. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-4947? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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