CVE-2006-3807: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 5.5% chance of exploitation in the next 30 days.

Mozilla Firefox before 1.5.0.5, Thunderbird before 1.5.0.5, and SeaMonkey before 1.0.3 allows remote attackers to execute arbitrary code via script that changes the standard Object() constructor to return a reference to a privileged object and calling "named JavaScript functions" that use the constructor.

Affected products

• Mozilla Firefox: version 1.5 only; version 1.5.0.1 only; version 1.5.0.2 only; version 1.5.0.3 only; version 1.5.0.4 only
• Mozilla Seamonkey: version 1.0 only; version 1.0.1 only; version 1.0.2 only
• Mozilla Thunderbird: version 1.5 only; version 1.5.0.2 only; version 1.5.0.4 only

Published 2006-07-27. Last modified 2026-06-16.