Apache Struts 2 vulnerable to remote code execution (S2-061)


Apache Struts 2 provided by The Apache Software Foundation contains a remote code execution vulnerability due to improper input validation (CWE-20).

Masato Anzai of Aeye Security Lab, inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 8.1 (High) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
CVSS V2 Severity:
Base Metrics 6.8 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial
Affected Products

Apache Software Foundation
  • Apache Struts 2.0.0 to 2.5.25


A remote attacker may execute arbitrary code.

[Update the software]
Update the software to the latest version according to the information provided by the developer.

[Apply the workaround]
Do not use forced OGNL evaluation in the tag's attributes based on untrusted/unvalidated user input.
The developer reccomends the users to follow the recommendations from the Security Guide.
Vendor Information

Apache Software Foundation
CWE (What is CWE?)

  1. Improper Input Validation(CWE-20) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2020-17530

  1. JVN : JVN#43969166
  2. JPCERT : Alert Regarding Vulnerability in Apache Struts 2 (S2-061)
Revision History

  • [2020/12/11]
      Web page was published