Fundamentals of Secure Software - Cross-Site Scripting

The video tutorial explains cross site scripting (XSS), a security vulnerability in web applications that allows attackers to inject scripts into web pages. It covers two types of XSS attacks: reflected and persistent. Reflected XSS involves attackers creating a malicious URL to steal information, often using social engineering. Persistent XSS involves inserting a script into a website's database, affecting all users who view the page. The tutorial emphasizes the importance of input validation to prevent such attacks.

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