CVE-2012-0838: Struts2: Certain strings evaluated as OGNL expressions, leading to run-time data modification or arbitrary code execution

Severity: Critical

CVSS Score: 10

Apache Struts 2 before 2.2.3.1 evaluates a string as an OGNL expression during the handling of a conversion error, which allows remote attackers to modify run-time data values, and consequently execute arbitrary code, via invalid input to a field.