CVE-2025-4947

QUIC certificate check skip with wolfSSL

CVE-2025-4947 is fixed in curl on 1 platform, first by DEBIAN-CVE-2025-4947, released May 28, 2025. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

6.5

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0030

22nd percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
curl · Debian 13.5 (trixie)	8.14.0-1	DEBIAN-CVE-2025-4947	May 28, 2025
curl · Debian 14	8.14.0-1	DEBIAN-CVE-2025-4947	May 28, 2025
curl · opensuse-leap 15.6	8.14.1-150600.4.28.1	SUSE-SU-2025:03198-1	Sep 12, 2025
curl · sles 15.6	8.14.1-150600.4.28.1	SUSE-SU-2025:03198-1	Sep 12, 2025
curl · sles 15.7	8.14.1-150600.4.28.1	SUSE-SU-2025:03198-1	Sep 12, 2025

Details

Published
May 28, 2025
Weakness
Improper Certificate Validation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-4947

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