Moanshop.7z

Crafts a malicious POST request to pollute the server’s environment.

Overwriting settings in the rendering engine (like EJS or Pug) to force the server to execute malicious system commands. Summary of the Solution To solve the challenge, a researcher typically: Downloads and extracts the moanshop.7z file.

Admin panels or debugging routes not visible in the UI. moanshop.7z

Injecting an isAdmin: true property into the prototype so that every user session is treated as an administrator.

The file is associated with a widely known and high-stakes Capture The Flag (CTF) challenge, typically categorized under Web Exploitation or Reverse Engineering . Crafts a malicious POST request to pollute the

Identifies a vulnerable merge function in the cart.js or admin.js file.

An attacker sends a JSON payload containing the __proto__ key. This allows them to inject properties into the global object prototype, effectively changing the behavior of the entire application. 3. From Pollution to Remote Code Execution (RCE) Admin panels or debugging routes not visible in the UI

In this challenge, participants are presented with a compressed archive ( .7z ) containing the source code for a fictional online storefront called "Moan Shop." The objective is to identify and exploit vulnerabilities within the application to retrieve a hidden "flag"—a specific string of text that proves the system was successfully breached.