The CookieInterceptor component in Apache Struts before 2.3.1.1 does not use the parameter-name whitelist, which allows remote attackers to execute arbitrary commands via a crafted HTTP Cookie header that triggers Java code execution through a static method.
View the template here CVE-2012-0392.yaml
References:
https://nvd.nist.gov/vuln/detail/CVE-2012-0392