Team.
We analysed the CVE-2016-1182 vulnerability and found that struts 1.1.x through 1.3.10 do 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.
We had changed the relevant struts sources and had got an updated struts jar. Note that the commons-beanutils.jar has to be upgraded to 1.9.3 (from 1.8, the bundled one) for this change.
We had uploaded the zip of these 2 jars (WEB-INF/lib/struts.jar & apache/tomcat/server/lib/commons-beanutils.jar) herewith (in the same directory format).
Please unzip the zip from this link under NMS_HOME and restart the server.
(P.S. If you had been using Tomcat above 6 (7/8/8.5/9), please replace the commons-beanutils.jar under apache/tomcat/lib).