The Internet Explorer, Firefox, Chrome, and Safari browsers are susceptible to attacks that allow webmasters to glean highly sensitive information about the people visiting their sites, including their full names, email addresses, location, and even stored passwords, a security researcher says.
In a talk scheduled for next week's Black Hat security conference in Las Vegas, Jeremiah Grossman, CTO of White Hat Security, plans to detail critical weaknesses that are enabled by default in the browsers, which are the four biggest by market share. The vulnerabilities have yet to be purged by the respective browser makers despite months, and in some cases, years of notice.

Among the most serious is a vulnerability in Apple's Safari and earlier versions of Microsoft's IE that exposes names, email addresses, and other sensitive information when a user visits a booby-trapped website. The attack exploits the browsers' autocomplete feature used to automatically enter commonly typed text into websites. It works by creating a webpage with fields carrying titles such as

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