Part 1 – What is XSS

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Part 1 – What is XSS

This lesson offers and introduction into cross site scripting, also called XSS. This lesson discusses the following:
1. What is XSS?
2. Attack types?
3. Attack examples
4. Why is this dangerous?
5. Examples of real world attacks
XSS is a client side code vulnerability which allows an attacker to inject malicious scripts and can be used to obtain information from a compromised site. XSS is the most common vulnerability on web sites and there are three types: persistent, reflected and DOM-based. However, this lesson will only cover the persistent and reflected types.

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