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Mozilla Foundation Security Advisory 2007-33

Title: XUL pages can hide the window titlebar
Impact: Low
Announced: October 18, 2007
Reporter: Eli Friedman
Products: Firefox, SeaMonkey

Fixed in: Firefox 2.0.0.8
  SeaMonkey 1.1.5

Description

Mozilla developer Eli Friedman discovered that web pages written in the XUL markup language (rather than the usual HTML) can hide their window's titlebar. It may have been possible to abuse this ablity to create more convincing spoof and phishing pages.

References