CVE-2012-0445: Mozilla Firefox 4.x through 9.0, Thunderbird 5.0 through 9.0, and SeaMonkey before 2.7 allow remote attacke...

Security readout for executives and security teams

This flaw let a remote website or crafted HTML content bypass Mozilla’s frame-navigation rules and replace sub-frames in affected Firefox, Thunderbird, and SeaMonkey versions. Business risk is mainly legacy-client exposure: users on obsolete browsers or mail clients could be misled by page or frame content appearing where it should not. Exposure is likely limited to environments still running the 2012-era affected Mozilla applications or distribution packages derived from them. Modern supported Mozilla releases should not match the vulnerable ranges stated in the source bundle. Handle as a legacy exposure cleanup item unless vulnerable clients are still present. If they are, prioritize removal or upgrade because the attack surface is remote web or email content and the affected software is long out of support. Mitigation focus: Inventory Firefox, Thunderbird, and SeaMonkey versions on managed endpoints.; Upgrade affected Mozilla applications beyond the vulnerable ranges using vendor or distribution advisories.; Remove unsupported legacy Mozilla clients where business use is no longer required..

Prepared

Jun 27, 2026, 17:28 UTC (UTC+00:00)

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