CVE-2025-4947

QUIC certificate check skip with wolfSSL

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

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.

*Credits: Hiroki Kurosawa, Stefan Eissing

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

Poc

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2025-05-19 CVE Reserved
2025-05-28 CVE Published
2025-05-28 CVE Updated
2025-05-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (4)

URL	Tag	Source
https://curl.se/docs/CVE-2025-4947.html
https://curl.se/docs/CVE-2025-4947.json
https://hackerone.com/reports/3150884
http://www.openwall.com/lists/oss-security/2025/05/28/4

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Curl Search vendor "Curl"		Curl Search vendor "Curl" for product "Curl"				8.13.0 Search vendor "Curl" for product "Curl" and version "8.13.0"		en		Affected
Curl Search vendor "Curl"		Curl Search vendor "Curl" for product "Curl"				8.12.1 Search vendor "Curl" for product "Curl" and version "8.12.1"		en		Affected
Curl Search vendor "Curl"		Curl Search vendor "Curl" for product "Curl"				8.12.0 Search vendor "Curl" for product "Curl" and version "8.12.0"		en		Affected
Curl Search vendor "Curl"		Curl Search vendor "Curl" for product "Curl"				8.11.1 Search vendor "Curl" for product "Curl" and version "8.11.1"		en		Affected
Curl Search vendor "Curl"		Curl Search vendor "Curl" for product "Curl"				8.11.0 Search vendor "Curl" for product "Curl" and version "8.11.0"		en		Affected
Curl Search vendor "Curl"		Curl Search vendor "Curl" for product "Curl"				8.10.1 Search vendor "Curl" for product "Curl" and version "8.10.1"		en		Affected
Curl Search vendor "Curl"		Curl Search vendor "Curl" for product "Curl"				8.10.0 Search vendor "Curl" for product "Curl" and version "8.10.0"		en		Affected
Curl Search vendor "Curl"		Curl Search vendor "Curl" for product "Curl"				8.9.1 Search vendor "Curl" for product "Curl" and version "8.9.1"		en		Affected
Curl Search vendor "Curl"		Curl Search vendor "Curl" for product "Curl"				8.9.0 Search vendor "Curl" for product "Curl" and version "8.9.0"		en		Affected
Curl Search vendor "Curl"		Curl Search vendor "Curl" for product "Curl"				8.8.0 Search vendor "Curl" for product "Curl" and version "8.8.0"		en		Affected