Trapped Source

Trapped Source is a Challenge in the Hackthebox platform

Intergalactic Ministry of Spies tested Pandora’s movement and intelligence abilities. She found herself locked in a room with no apparent means of escape. Her task was to unlock the door and make her way out. Can you help her in opening the door?

This room launches a webpage with the following

Initial thoughts are to try and brute force this lock with Hydra/Burp/Etc.

While digging around the page source, it was much simpler

Looks like they hid the correct pin in the page source. Typing that in, we are able to retrieve the Flag