Writeup Simple Food Notifications

Sun, 21 Jun 2026 20:00:00 +0200

Notes: This is a writeup from the author of the challenge. The handout is simple-food-notifications.tar.gz.

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Users can simulate ordering food on the website and receive a notification on a provided callback URL. The goal of the challenge is to request /vip-meal from the IP 127.0.0.1.

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The challenge simulates a website where users can order food and receive notifications once it’s ready. The ordering logic has a simple rate limiting mechanism and starts a new thread for each order.

Writeup Painting Dice

Sun, 22 Jun 2025 00:00:00 +0200

Notes: This is a writeup from the author of the challenge. The handout is painting-dice.tar.gz.

Short challenge description Link to heading

User can update a profile with HTML and CSS. Javascript execution is not possible because of a Strong CSP. User can requests a review from the admin bot, which then sends them a screenshot from their profile. To get the flag the user needs to be upgraded.

Gpnctf on sn00py1310's Blog

Writeup Simple Food Notifications

Short challenge description Link to heading

Challenge description Link to heading

Writeup Painting Dice

Short challenge description Link to heading