Apache Struts 2.x before 2.3.28 does not sanitize text in the Locale object constructed by I18NInterceptor, which might allow remote attackers to conduct cross-site scripting (XSS) attacks via unspecified vectors involving language display.
struts.apache.org/docs/s2-030.html
github.com/apache/struts
github.com/apache/struts/blob/f511034acd7b97e07d281169b38e2af40c94903d/core/src/main/java/org/apache/struts2/interceptor/I18nInterceptor.java
github.com/apache/struts/commit/fc2179cf1ac9fbfb61e3430fa88b641d87253327
nvd.nist.gov/vuln/detail/CVE-2016-2162
web.archive.org/web/20210123095722/www.securityfocus.com/bid/85070
web.archive.org/web/20210801130539/www.securitytracker.com/id/1035272