Vulnerability in Apache Log4j
CVE-2025-68161
The Socket Appender in Apache Log4j Core versions 2.0-beta9 through 2.25.2 does not perform TLS hostname verification of the peer certificate, even when the verifyHostName https://logging.apache.org/log4j/2.x/manual/appenders/network.html…
EPSS: 0.008 (51.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Apache Log4j — versions 2.0
- Apache Software Foundation Log4j Core — versions 2.0-beta9, 3.0.0-alpha1
Weakness classification (CWE)
References
- security@apache.org (Patch, patch, Issue Tracking)
- security@apache.org (Exploit, vendor-advisory, Vendor Advisory)
- security@apache.org (vendor-advisory, Vendor Advisory)
- security@apache.org (related, Product)
- security@apache.org (related, Product)
- security@apache.org (vendor-advisory, Mailing List)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-68161?
- CVE-2025-68161 is a medium-severity vulnerability in Apache Log4j, classified under Improper Validation of Certificate with Host Mismatch. CVSS score: 4.8/10. Published 2025-12-18.
- How severe is CVE-2025-68161?
- Medium severity. CVSS v3 base score is 4.8 out of 10.