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We've talked about Cross Site Scripting (XSS) before, and for good reason, it's a risk far too many sites are vulnerable to. XSS is scary because it runs in the context of the trusted relationship between your browser and a website; XSS can do everything you can do.

XSS cookie theft

Let's look at another example of an XSS exploit: stealing administrative access to a site.

• An attacker will enter Javascript that steals the visitor's browser cookie
• An administrator will unknowingly execute this Javascript