Back to WEB-01 SIMULATED LAB
Your first challenge

Some secrets are
hiding in plain sight.

Welcome to the Secret Cyber Clubhouse. A little curiosity goes a long way. Find the hidden invitation, unlock the room, and prove your skills by capturing the flag.

Challenge 001
Easy · 50 points

Unlock the Secret Room

Every clubhouse has a secret entrance. Somewhere in this webpage, a hidden invitation code is waiting to be found. Can you discover it?

Your Score
Capture the flag to earn points
0 points
A little hint
Sometimes, the secrets you want are hidden where your eyes can’t see them. Have you checked behind the webpage? Right-click and “View Page Source”, or open DevTools.
Invitation accepted

Welcome inside.

You found the hidden invitation code. Here is your challenge flag — submit it on the WEB-01 card to earn your points.

Challenge Flag
Submit it on the challenge page →

What did you learn?

The invitation code was hidden inside an HTML comment in this page’s source. HTML comments are sent to the browser and visible to anyone who inspects the source. Secret codes and passwords should never be stored in client-side HTML — they belong on the server, protected by proper access controls.