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Apache Struts 2 Documentation
S2-007
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## Summary

User input is evaluated as an OGNL expression when there's a conversion error

Who should read this | All Struts 2 developers
Impact of vulnerability | Remote Code Execution
Maximum security rating | Important
Recommendation | Developers should either upgrade to Struts 2.2.3.1 or apply the configuration changes described below
Affected Software | Struts 2.0.0 - Struts 2.2.3
Original JIRA Tickets | WW-3668
Reporter | Hideyuki Suzumi
CVE Identifier | -

## Problem

User input is evaluated as an OGNL expression when there's a conversion error. This allows a malicious user to execute arbitrary code.
A more detailed description is found in the referenced JIRA ticket.

## Solution

Upgrade to Struts 2.2.3.1.