Security · 2h ago
CTF Writeup: Bypassing Client-Side Blur to Reveal Hidden Image
A BroncoCTF challenge required solving 500 calculus problems to unblur an image, but the logic was entirely client-side. By directly fetching the image blob URL from the JavaScript, the flag was revealed without solving any problems. The writeup demonstrates a common web security oversight.
Meridian48 take
The challenge highlights a classic client-side trust fallacy, but as a CTF exercise it's more of a fun puzzle than a real-world vulnerability.
ctfclient-side-security