Web Security: Common Vulnerabilities And Their Mitigation - Learn by example - how does a XSS attack work?

The video tutorial explains cross-site scripting (XSS) attacks, highlighting how attackers exploit vulnerabilities in websites to steal user data. It identifies the key actors in an XSS attack: the attacker, the victim, and the vulnerable website. The tutorial demonstrates how attackers use malicious scripts to capture session IDs via cookies, emphasizing the importance of sanitizing user inputs to prevent such attacks. A practical example using PHP code illustrates how unsanitized user input can lead to successful XSS attacks, compromising user data.

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