TryHackMe XSS Vulnerability Walkthrough 🕵️‍♂️

Learn how to detect and exploit XSS vulnerabilities, giving you control of other visitor's browsers.

*As always, I recommend to read through every task to get a complete understanding of each room. Happy learning!*

♾️TIMESTAMP ♾️
1:06 Task 1 - Room Brief
1:25 Task 2 - XSS Payloads
2:53 Task 3 - Reflected XSS
3:32 Task 4 - Stored XSS
4:01 Task 5 - DOM Based XSS
4:42 Task 6 - Blind XSS
5:53 Task 7 - Perfecting your payload
14:45 Task 8 - Practical Example (Blind XSS)

Cross-site Scripting (XSS) is a type of web security vulnerability that occurs when an attacker injects malicious scripts or code into a website or web application. This injection takes place in areas where user-generated content is accepted, such as input fields, comments, or URLs. When other users access the affected web page, their browsers unintentionally execute the injected code, allowing the attacker to steal sensitive information, hijack user sessions, redirect users to malicious websites, or perform other harmful actions.

There are different types of XSS attacks, including:

Stored XSS: Malicious scripts are permanently stored on the target server and served to users whenever they access the affected page.

Reflected XSS: Malicious scripts are embedded in URLs or input fields and immediately reflected back to users through a vulnerable web application.

DOM-based XSS: The attack takes place within the Document Object Model (DOM) of the web page, manipulating its structure and behavior dynamically.

To mitigate XSS vulnerabilities, web developers must practice secure coding techniques, such as input validation and output encoding, to ensure that user-generated content cannot execute as code on the website. Regular security audits and updates are essential to identify and patch potential vulnerabilities. Users should also be cautious when clicking on links or submitting personal information on websites to protect themselves from potential XSS attacks.