Skip to main content
  1. CTF Writeups/
  2. KOSS CTF 2025/

Invisibility Cloak

·
web 50pt
subzcuber
Author
subzcuber
i like to imagine i’m funny

Flag: kossCTF{always_inspect_the_source}

Author: subzcuber

Description:

Harry’s Invisibility Cloak does a fantastic job hiding him from Voldemort. Is it hiding anything else?


This challenge simply involved using your browser tools to inspect the source. In the html you would notice a <span> tag with inline styling making it invisble.

<span style="color: transparent;cursor: none; text-shadow: 0 0 5px rgba(0,0,0,0.09);text-decoration: line-through;">kossCTF{always_inspect_the_source}</span>

A simpler approach to these kind of challenges is to simply do Control + A (select all) on the web page. This highlights everything, including “invisible” elements.

flag

Reply by Email

Related

Television
osint 290pt
I reused a challenge
Hokago Tea Time
web 166pt cookie
i really love k-on
Password Manager
web 50pt path traversal
path traversal is blocked, or is it?