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Mozilla Foundation Security Advisory 2005-39

Title: Arbitrary code execution from Firefox sidebar panel II
Severity: Critical
Reporter: Kohei Yoshino
Products: Firefox

Fixed in: Firefox 1.0.3


Sites can use the _search target to open links in the Firefox sidebar. Two missing security checks allow malicious scripts to first open a privileged page (such as about:config) and then inject script using a javascript: url. This could be used to install malicious code or steal data without user interaction.


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