ActionServlet.java in Apache Struts 1 1.x through 1.3.10 does not properly restrict the Validator configuration, which allows remote attackers to conduct cross-site scripting (XSS) attacks or cause a denial of service via crafted input, a related issue to CVE-2015-0899.

A vulnerability in Apache Struts 1 ActionForm allowing unintended remote operations against components on server memory, such as Servlets and ClassLoader, was found.

Affects Apache Struts versions 1.0 through 1.3.10

External References:

https://jvn.jp/en/jp/JVN03188560/

Apache Commons BeanUtils, as distributed in lib/commons-beanutils-1.8.0.jar in Apache Struts 1.x through 1.3.10 and in other products requiring commons-beanutils through 1.9.2, does not suppress the class property, which allows remote attackers to "manipulate" the ClassLoader and execute arbitrary code via the class parameter, as demonstrated by the passing of this parameter to the getClass method of the ActionForm object in Struts 1.

Apache Software Foundation (ASF) Struts before 1.2.9 allows remote attackers to bypass validation via a request with a 'org.apache.struts.taglib.html.Constants.CANCEL' parameter, which causes the action to be canceled but would not be detected from applications that do not use the isCancelled check.

ActionForm in Apache Software Foundation (ASF) Struts before 1.2.9 with BeanUtils 1.7 allows remote attackers to cause a denial of service via a multipart/form-data encoded form with a parameter name that references the public getMultipartRequestHandler method, which provides further access to elements in the CommonsMultipartRequestHandler implementation and BeanUtils.

Cross-site scripting (XSS) vulnerability in (1) LookupDispatchAction and possibly (2) DispatchAction and (3) ActionDispatcher in Apache Software Foundation (ASF) Struts before 1.2.9 allows remote attackers to inject arbitrary web script or HTML via the parameter name, which is not filtered in the resulting error message.