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.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.