HackThisSite – Missions Writeups

This repository documents my solutions and lessons learned from the Missions on HackThisSite.org. These challenges introduce fundamental web security concepts, including:

• HTML and JavaScript inspection
• Client-side authentication flaws
• Cookie manipulation and tampering
• URL and input-based attacks
• Directory traversal and misconfigurations

Completed Missions

Basic Missions

Mission	Topic	Summary
1	HTML Source	Found credentials in HTML comments
2	Simple Auth Bypass	Modified form values using DevTools
3	JavaScript Logic	Extracted password from JS condition
4	URL Guessing	Accessed hidden page via path edit
5	Cookies	Changed cookie value to bypass check
6	POST Tampering	Edited form submission manually
7	PHP Logic Guessing	Inferred password from PHP behavior
8	Input Filtering	Discovered accepted input format
9	JS Filtering Bypass	Used encoding to bypass filter
10	Cookie Tampering	Overwrote client-side cookie
11	Directory Traversal	Discovered .htaccess path leakage

---

Realistic Missions

Mission	Topic	Summary
1	HTML Source	Modified form values using DevTools

---

Goal

Eventually, this repository will include detailed writeups and lessons for all HackThisSite missions, organized by difficulty and category.

---

⚠️ Disclaimer: This repo is for educational purposes only. No exploits or solutions here should be used unethically or on systems you don’t own or have permission to test.