Cross-site scripting (XSS) vulnerability in Symantec Norton Internet Security 2003 6.0.4.34 allows remote attackers to inject arbitrary web script or HTML via a URL to a blocked site, which is displayed on the blocked sites error page.
https://exchange.xforce.ibmcloud.com/vulnerabilities/13528
http://www.securityfocus.com/archive/1/342548
http://securityresponse.symantec.com/avcenter/security/Content/2003.10.27.html