Log forging via unsanitized lookup key
Published Jul 30, 2025 · Updated Nov 4, 2025
Log injection in Apache Struts Extras before 2 allows remote attackers to forge application log lines through crafted request input. The getLookupMapName method of LookupDispatchAction writes an unmatched attacker-controlled keyName directly into an error log without neutralizing newline characters. Exposure requires an application to use LookupDispatchAction and route attacker-controlled dispatch parameters to it; forged entries can mislead human or automated log consumers.
Summary
What happened
Log injection in Apache Struts Extras before 2 allows remote attackers to forge application log lines through crafted request input. The getLookupMapName method of LookupDispatchAction writes an unmatched attacker-controlled keyName directly into an error log without neutralizing newline characters. Exposure requires an application to use LookupDispatchAction and route attacker-controlled dispatch parameters to it; forged entries can mislead human or automated log consumers.
The record
- CVE
- CVE-2025-54656
- Published
- Jul 30, 2025
- Updated
- Nov 4, 2025
- Vendor
- The Apache Software Foundation
- Product
- Apache Struts Extras
- Classifications
- CWE-117, CAPEC-93
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 30, 2025CVE publishedPublication date reported by the CVE source.
- Nov 4, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- HeroDevs crafted dispatchParam reproductionproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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