Seasar S2Struts vulnerable to input validation bypass


Seasar S2Struts provided by The Seasar Foundation is a software framework for developing Java web applications. Seasar S2Struts is vulnerable to an issue contained in the Apache Struts 1 Validator, because S2Struts 1.2.x uses Apache Struts 1.2.x, and S2Struts 1.3.x uses Apache Struts 1.3.x.

The Validator in Apache Struts 1.1 and later contains a function (MPV -- Multi Page Validator) to efficiently define rules for input validation across multiple pages during screen transitions.
The MPV contains a vulnerability where input validation may be bypassed.
When the Apache Struts 1 Validator is used, the web application may be vulnerable even when the MPV is not used explicitly.
CVSS Severity (What is CVSS?)

CVSS V2 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

The Seasar Foundation
  • S2Struts 1.2.13 and earlier
  • S2Struts 1.3.2 and earlier


Input validation being bypassed may result in invalid data being entered into the database. Affects of the vulnerability depend on the application.

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Vendor Information

The Seasar Foundation
CWE (What is CWE?)

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

  1. CVE-2015-0899

  1. JVN : JVN#91383083
  2. National Vulnerability Database (NVD) : CVE-2015-0899
Revision History

  • [2015/04/10]
      Web page was published
      References : Content was added