Cross-site scripting (XSS) vulnerability in IBM Web Experience Factory (WEF) 6.1.5 through 8.5.0.1, as used in WebSphere Dashboard Framework (WDF) and Lotus Widget Factory (LWF), allows remote attackers to inject arbitrary web script or HTML by leveraging a Dojo builder error in an unspecified WebSphere Portal configuration, leading to improper construction of a response page by an application.