SIN 3WEB CLIENT–RELATED VULNERABILITIES (XSS)

OVERVIEW OF THE SIN

The advent of desktop and web-based gadgets and widgets has ushered in a more common kind of sin: that of the type-0, or DOM-based, cross-site scripting vulnerability. Notice we said “more common” and not “new”; these sins are not new, but they have become more common over the last couple of years.

The two most sinful forms of code that suffer type-0 XSS are

Image Gadgets and widgets

Image Static HTML pages on the user’s computer

A gadget or widget is nothing more than a mini-application built ...

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