Web Security: Common Vulnerabilities And Their Mitigation - Sanitizing input

The video tutorial discusses the risks of code injection and the importance of validating and sanitizing user inputs to prevent security vulnerabilities like cross-site scripting (XSS). It provides a PHP example to illustrate how improper handling of form inputs can lead to security risks. The tutorial also highlights how modern browsers have built-in protections against such vulnerabilities.

What is the role of the PHP_SELF variable in form handling?

What does URL encoding do in the context of web security?

How can a malicious user exploit a form that does not properly sanitize input?

What is cross-site scripting (XSS) and why is it a security risk?