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Mozilla Foundation Security Advisory 2009-52

Title: Form history vulnerable to stealing
Impact: Moderate
Announced: October 27, 2009
Reporter: Paul Stone
Products: Firefox

Fixed in: Firefox 3.5.4
  Firefox 3.0.15

Description

Security researcher Paul Stone reported that a user's form history, both from web content as well as the smart location bar, was vulnerable to theft. A malicious web page could synthesize events such as mouse focus and key presses on behalf of the victim and trick the browser into auto-filling the form fields with history entries and then reading the entries.

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