Hannon Hill Cascade Server 5.7 and other versions allows remote authenticated users to execute arbitrary programs or Java code via a crafted XSLT stylesheet with "extension elements and extension functions" that trigger code execution by Xalan-Java, as demonstrated using xalan://java.lang.Runtime.
https://www.exploit-db.com/exploits/8247
https://exchange.xforce.ibmcloud.com/vulnerabilities/49332
http://www.securityfocus.com/bid/34186
http://www.securityfocus.com/archive/1/501981/100/0/threaded