The Athena-based emulators use control panels (like FluxCP) and in-game commands to manage thousands of character variables and "Zeny" transactions.
A Minecraft private server runs a web-based GM panel on port 8080 without HTTPS. A malicious user discovers the endpoint /api/giveitem?player=Hacker&item=diamond_sword&amount=999 . They write a simple Python script and flood the server with 10,000 requests in 3 seconds, crashing the economy and the server. game private server gm tool