CVE-2025-54656 Apache Struts Extras: Improper Output Neutralization for Logs
Attackers can inject fake log entries in Apache Struts Extras, confusing log consumers; the project is retired with no fix available.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-54656?
CVE-2025-54656 is a medium-severity vulnerability in Apache Struts Extras, published on 30 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
** UNSUPPORTED WHEN ASSIGNED ** Improper Output Neutralization for Logs vulnerability in Apache Struts.
This issue affects Apache Struts Extras: before 2.
When using LookupDispatchAction, in some cases, Struts may print untrusted input to the logs without any filtering. Specially-crafted input may lead to log output where part of the message masquerades as a separate log line, confusing consumers of the logs (either human or automated).
As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users.
NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
Weakness: CWE-117
Which versions are affected by CVE-2025-54656?
4 open source packages ship an affected version, including org.apache.struts:struts-extras and struts:struts. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.struts:struts-extras Maven | All versions to 1.3.10 | None |
org.apache.struts:struts-extras Maven | All versions to 1.3.10 | None |
struts:struts Maven | All versions | None |
struts:struts Maven | All versions | None |
Products include Apache Struts Extras.
How do I fix CVE-2025-54656?
Product is end of life, replace it.
Is CVE-2025-54656 being exploited?
There is no known exploitation of CVE-2025-54656 in the wild and no public exploit code.
Sources
Also known as GHSA-cx25-xg7c-xfm5.