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Mozilla Firefox/Thunderbird/SeaMonkey Chrome-Loaded About:Blank Script Execution Vulnerability

Mozilla Firefox, Thunderbird, and SeaMonkey are prone to a vulnerability that allows JavaScript to execute with unintended privileges.

A malicious site may be able to cause the execution of a script with Chrome privileges. Attackers could exploit this issue to execute hostile script code with privileges that exceed those that were intended. Certain Firefox extensions may not intend 'about:blank' to execute script code with Chrome privileges.

NOTE: This issue was introduced by the fix for MFSA 2007-20.