CVE-2025-54812
MEDIUMDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 64% of all known CVEs.
References
Related Vulnerabilities
Other CWE-117 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-43410 | Medium | 5.3 | 2.4% | - | Fix |
| CVE-2022-32549 | Medium | 5.3 | 2.3% | - | - |
| CVE-2019-14864 | Medium | 6.5 | 1.9% | - | Fix |
| CVE-2021-42250 | Medium | 6.5 | 1.8% | - | Fix |
| CVE-2024-47083 | High | 7.5 | 1.6% | - | - |
| CVE-2020-25646 | High | 7.5 | 1.4% | - | - |
Common questions
How do I fix CVE-2025-54812?
Upgrade log4cxx on debian 11 to 0.11.0-2+deb11u1 or later.
Is CVE-2025-54812 being actively exploited?
Not that we know of. CVE-2025-54812 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.2% is the estimated probability that it will be exploited in the next 30 days. That is higher than 64% of all scored CVEs.
How severe is CVE-2025-54812?
CVE-2025-54812 has a CVSS v3 base score of 5.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2025-54812 affect?
Published advisories record a fix for log4cxx (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2025-54812
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.