← Back to Challenges

🍪 Challenge 2: Cookie Monster

Browser cookies aren't just for remembering your login — sometimes they hide secrets too!

📖 The Story

You stumbled upon a mysterious online store. It boasts: "I've hidden a secret in your browser, and you'll never find it!" As a future security engineer, you won't take that lying down. You know browsers have something called "cookies" — small pieces of data that websites store in your browser. Time to investigate!
🏪 The Mystery Shop Home | Products | Contact

Welcome to The Mystery Shop!

We have a special event today~

I've secretly placed some "cookies" in your browser.

There are several cookies, but only ONE contains the real flag!

🍪🍪🍪

🛠️ How to View Cookies

  • Press F12 to open Developer Tools
  • Chrome: Click the Application tab → find Cookies on the left
  • Firefox: Click the Storage tab → find Cookies on the left
  • Or type document.cookie in the Console tab
💡 Need a hint? Click to reveal

Three cookies have been set, but only one contains the real flag. It's named secret_flag. Try typing document.cookie in the Developer Tools Console!