CookieInterceptor in Apache Struts 2.x before 2.3.20, when a wildcard cookiesName value is used, does not properly restrict access to the getClass method, which allows remote attackers to "manipulate" the ClassLoader and modify session state via a crafted request. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-0113.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-0116
• http://struts.apache.org/release/2.3.x/docs/s2-022.html
• http://www.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-350733.htm
• apache/struts@1a668af