Cross-site scripting (XSS) vulnerability in Sun ONE Web Server 6.0 SP9 and earlier, Java System Web Server 6.1 SP4 and earlier, Sun ONE Application Server 7 Platform and Standard Edition Update 6 and earlier, and Java System Application Server 7 2004Q2 Standard and Enterprise Edition Update 2 and earlier, allows remote attackers to inject arbitrary web script or HTML via unknown attack vectors, possibly involving error messages.