CVE-2025-54656: Apache Struts Extras

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

** 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.

Affected products

• Apache Struts Extras: before 2.0 (fixed in 2.0)

Published 2025-07-30. Last modified 2026-06-17.