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Mozilla/Netscape/Firefox Browser Modal Dialog Spoofing Vulnerability

Mozilla, Firefox, and Netscape Web browsers are reported prone to a vulnerability that may conceal modal dialogs by covering them with a pop-up window.

Download or security dialogs may be obscured by the use of JavaScript that places a specially crafted pop-up window that is directly placed on top of the dialog. This may induce a user into trusting the spoofed dialogs and taking further action based on this false sense of trust.

This issue was reported to affect Windows versions of the browsers.