Vulnerability in Apache Log4cxx
CVE-2025-54813
Improper Output Neutralization for Logs vulnerability in Apache Log4cxx. When using JSONLayout, not all payload bytes are properly escaped. If an attacker-supplied message contains certain non-printable characters, these will be passed al…
EPSS: 0.012 (64.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Apache Log4cxx
- Apache Software Foundation Log4cxx — versions 0.11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (vendor-advisory, Vendor Advisory)
- security@apache.org (Patch, patch, Issue Tracking)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-54813?
- CVE-2025-54813 is a high-severity vulnerability in Apache Log4cxx, classified under Improper Output Neutralization for Logs. CVSS score: 7.5/10. Published 2025-08-22.
- How severe is CVE-2025-54813?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-54813 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.