CVE-2025-54813

Name	CVE-2025-54813
Description	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 along in the message and written out as part of the JSON message. This may prevent applications that consume these logs from correctly interpreting the information within them. This issue affects Apache Log4cxx: before 1.5.0. Users are recommended to upgrade to version 1.5.0, which fixes the issue.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1111881

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
log4cxx (PTS)	bullseye	0.11.0-2	vulnerable
	bookworm	1.0.0-1	vulnerable
	forky, sid, trixie	1.4.0-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
log4cxx	source	(unstable)	(unfixed)			1111881

Notes

[trixie] - log4cxx <no-dsa> (Minor issue)
[bookworm] - log4cxx <no-dsa> (Minor issue)
https://logging.apache.org/security.html#CVE-2025-54813
https://github.com/apache/logging-log4cxx/pull/512
Fixed by: https://github.com/apache/logging-log4cxx/commit/a799c934545311ff4179c68e16bbeb02b5c66348 (rel/v1.5.0, v1.5.0-RC1)