How severe is CVE-2025-54656?

CVE-2025-54656 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-54656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-54656?

CVE-2025-54656 affects Apache Struts Extras. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-54656?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-54656 have an EU (EUVD) identifier?

Yes. CVE-2025-54656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23173.

When was CVE-2025-54656 published?

CVE-2025-54656 was published on 2025-07-30 and last updated on 2026-06-17.

CVE-2025-54656

CVE-2025-54656 is a medium-severity vulnerability in Apache Struts Extras with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-117.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23173
Weakness: CWE-117
Affected product: Apache Struts Extras
Published: 2025-07-30
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-54656?: ** 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.
How severe is CVE-2025-54656?: CVE-2025-54656 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-54656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-54656?: CVE-2025-54656 affects Apache Struts Extras. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-54656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-54656 have an EU (EUVD) identifier?: Yes. CVE-2025-54656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23173.
When was CVE-2025-54656 published?: CVE-2025-54656 was published on 2025-07-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:struts_extras:*:*:*:*:*:*:*:*

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