struts2-core-2.3.20.1.jar this file has serious vulnerability, is there a fix available from Atlassian, this file is in may locations see below
/opt/atlassian-crowd-2.8.4/crowd-webapp/WEB-INF/lib/struts2-core-2.3.20.1.jar
/opt/atlassian-crowd-2.8.4/demo-webapp/WEB-INF/lib/struts2-core-2.3.20.1.jar
/opt/atlassian-crowd-2.8.4/crowd-openidserver-webapp/WEB-INF/lib/struts2-core-2.3.20.1.jar
/opt/atlassian-crowd-2.8.4/crowd-openidclient-webapp/WEB-INF/lib/struts2-core-2.3.20.1.jar