Microsoft Internet Explorer 5.01 and 6 allows certain script to persist across navigations between pages, which allows remote attackers to obtain the window location of visited web pages in other domains or zones, aka “Window Location Information Disclosure Vulnerability.”
secunia.com/advisories/21396
securitytracker.com/id?1016663
www.osvdb.org/27850
www.securityfocus.com/bid/19339
www.vupen.com/english/advisories/2006/3212
docs.microsoft.com/en-us/security-updates/securitybulletins/2006/ms06-042
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A171