CVE-2005-2266: Firefox before 1.0.5 and Mozilla before 1.7.9 allows a child frame to call top.focus and other methods in a...

Security readout for executives and security teams

This is an old browser security flaw where Firefox and Mozilla could let a web page frame reach across domain boundaries. In practical terms, a malicious site could potentially steal sensitive web data, including cookies or passwords, from vulnerable browser sessions. Exposure is most likely in legacy environments still running Firefox before 1.0.5 or Mozilla before 1.7.9. Modern mainstream browsers are unlikely to be affected, but old kiosks, embedded desktops, archived virtual machines, or unmanaged Linux workstations should be checked. Treat this as a legacy exposure cleanup item unless affected browsers are still in production. If vulnerable browsers remain on systems accessing sensitive web applications, prioritize removal or upgrade because the impact includes credential and cookie theft. Mitigation focus: Upgrade Firefox to 1.0.5 or later and Mozilla to 1.7.9 or later.; Remove unsupported legacy Mozilla-family browsers from managed endpoints.; Check Debian, Red Hat, SUSE, and Mozilla advisories for package-specific fixed builds..

Prepared

Jun 29, 2026, 19:18 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.