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Vulnerabilities

Vulnerability · 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.

Published May 28, 2025 · catalog updated May 28, 2025 · libcurl accidentally skips the

Check this week

CVE-2025-4947 is not in CISA KEV. FIRST estimates a 29.00% chance of exploitation in the next 30 days. Check whether you run libcurl accidentally skips the.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (libcurl accidentally skips the).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
29.00%
Remediation
Vendor / distro source
Affected products
vendor curl curl 8.13.0 ≤8.13.0

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor curl curl 8.13.0 ≤8.13.08.13.0 ≤8.13.0

How to fix CVE-2025-4947

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-4947 is not in CISA KEV. FIRST estimates a 29.00% chance of exploitation in the next 30 days. Check whether you run libcurl accidentally skips the.

Which versions are affected?

Compare what you have installed with curl curl 8.13.0 ≤8.13.0 8.13.0 ≤8.13.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 29.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 28, 2025 · EUVD

    Detected

    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.

  2. May 28, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-4947

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-16303

    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.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog May 28, 2025. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.