What is the CVSS score of CVE-2025-4947?

CVE-2025-4947 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.1%.

Which versions of Curl are affected by CVE-2025-4947?

CVE-2025-4947 presents notable security risk rated CVSS 6.5. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available.. A patch is available.

Is there a public PoC exploit available for CVE-2025-4947?

Yes, a public proof-of-concept exploit is available for CVE-2025-4947. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-4947?

Within 7 days: Identify affected systems and apply vendor patches promptly. Vendor patch is available.

Curl CVE-2025-4947

MEDIUM

Improper Certificate Validation (CWE-295)

2025-05-28 2499f714-1537-4658-8207-48ae4bb9eae9

Information Disclosure Red Hat Curl Suse

6.5

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:44 vuln.today

Patch released

Mar 28, 2026 - 18:44 nvd

Patch available

PoC Detected

Jun 26, 2025 - 15:08 vuln.today

Public exploit code

CVE Published

May 28, 2025 - 07:15 nvd

MEDIUM 6.5

DescriptionNVD

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.

AnalysisAI

libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-295. 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. Affected products include: Haxx Curl.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.