Mozilla before 1.7.6, and Firefox before 1.0.1, allows remote attackers to spoof arbitrary web sites by injecting content from one window into a target window whose name is known but resides in a different domain, as demonstrated using a pop-up window on a trusted web site, aka the "window injection" vulnerability.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10117
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100045
http://www.redhat.com/support/errata/RHSA-2005-384.html
http://www.redhat.com/support/errata/RHSA-2005-176.html
http://www.mozilla.org/security/announce/mfsa2005-13.html
http://www.gentoo.org/security/en/glsa/glsa-200503-30.xml
http://www.gentoo.org/security/en/glsa/glsa-200503-10.xml
http://secunia.com/secunia_research/2004-13/advisory/
http://secunia.com/multiple_browsers_window_injection_vulnerability_test/