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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)

Triggers a system command (e.g., cat /flag.txt ) to read the secret flag. moanshop.7z

While the exact details can vary depending on the specific competition (e.g., SECCON, HTB, or private bug bounty simulations), the typical write-up for this challenge focuses on three main stages: An attacker sends a JSON payload containing the