Cross-site scripting (XSS) vulnerability in the echo functionality on IBM WebSphere DataPower SOA appliances with firmware 3.8.2, 4.0, 4.0.1, 4.0.2, and 5.0.0 allows remote attackers to inject arbitrary web script or HTML via a SOAP message, as demonstrated by the XML Firewall, Multi Protocol Gateway (MPGW), Web Service Proxy, and Web Token services.