Cross-Site Scripting (XSS) Explained

This video explains the concept of Cross-Site Scripting (XSS) using a simplified example of Stored XSS (and two other types), where a malicious comment posted in a website’s comment section affects other users who later view that page. This is a conceptual demonstration to help understand how the vulnerability works.

The examples shown are intentionally primitive for learning purposes. Modern web applications typically implement multiple security measures—such as input sanitization, output encoding, Content Security Policy (CSP), HttpOnly cookies, and other defensive mechanisms—making real-world exploitation significantly more difficult than the scenarios demonstrated here.

The concepts and inspiration for this video are based on the excellent free hands-on practice labs by PortSwigger, which are highly recommended for anyone looking to learn web security through practical exercises.

Educational Purpose Only: This video is created solely to spread cybersecurity awareness and education. I do not encourage, promote, or support unauthorized hacking, exploitation, or any malicious activity. Always practice security testing only on systems you own or have explicit permission to test.