Apache Struts vulnerable to validation bypass in Getter method


Apache Struts provided by the Apache Software Foundation is a software framework for creating web applications in Java.
Web applications that are developed using Apache Struts 2 contain a validation bypass in Getter method vulnerability.

JPCERT/CC Addendum
[Update: August 25, 2016]
CVE-2016-4433 (S2-039) has been addressed in Struts 2.3.29, although the vendor has confirmed that similar issues still exist. According to the developer, these issues will be addressed in a future release.

Takeshi Terada of Mitsui Bussan Secure Directions, 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 5.6 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: Low
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 2.3.20 to

Affects of this vulnearbility to Apache Struts 1 is unknown. As of April 5, 2013, Apache Software Foundation has announced that Apache Strtus 1 is no longer developed or supported.

An unauthenticated remote attacker may redirect a user to unvalidated locations, store a crafted date, or lead a user to perform unintended operations.

[Update the Software]
Update to the latest version according to the information provided by the developer.
Vendor Information

Apache Software Foundation Red Hat, Inc.
CWE (What is CWE?)

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

  1. CVE-2016-4433

  1. JVN : JVN#45093481
  2. National Vulnerability Database (NVD) : CVE-2016-4433
Revision History

  • [2016/06/20]
      Web page was published
      Overview was modified
      References : Content was added
      Vendor Information : Content was added
      Overview was modified