Improper Output Neutralization for Logs Affecting log4cxx package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-DEBIAN14-LOG4CXX-12157416
- published23 Aug 2025
- disclosed22 Aug 2025
Introduced: 22 Aug 2025
NewCVE-2025-54812 (opens in a new tab)How to fix?
There is no fixed version for Debian:14 log4cxx.
NVD Description
Note: Versions mentioned in the description apply only to the upstream log4cxx package and not the log4cxx package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
Improper Output Neutralization for Logs vulnerability in Apache Log4cxx.
When using HTMLLayout, logger names are not properly escaped when writing out to the HTML file. If untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user. In order to activate this, the following sequence must occur:
Log4cxx is configured to use HTMLLayout.
Logger name comes from an untrusted string
Logger with compromised name logs a message
User opens the generated HTML log file in their browser, leading to potential XSS
Because logger names are generally constant strings, we assess the impact to users as LOW
This issue affects Apache Log4cxx: before 1.5.0.
Users are recommended to upgrade to version 1.5.0, which fixes the issue.