CVE-2025-15346

Description

A vulnerability in the handling of verify_mode = CERT_REQUIRED in the wolfssl Python package (wolfssl-py) causes client certificate requirements to not be fully enforced.Because the WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT flag was not included, the behavior effectively matched CERT_OPTIONAL: a peer certificate was verified if presented, but connections were incorrectly authenticated when no client certificate was provided.This results in improper authentication, allowing attackers to bypass mutual TLS (mTLS) client authentication by omitting a client certificate during the TLS handshake.The issue affects versions up to and including 5.8.2.

Risk Information

Base Score

8.6

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C

EPSS Score

Exploitation Probability

0.066

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2025-15346 are fixed in Python-wolfssl 5.8.4.post0	Windows
Vulnerabilities CVE-2025-15346 are fixed in Python-wolfssl for linux 5.8.4.post0	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234