Dev Blog -- Bugs

Windows XP has been notorious for vulnerabilities. If you keep coding on a platform known for vulnerabilities, you will be open to those vulnerabilities as well.

You appear to be confused, mistaken or misinformed here.
The OS the client runs has absolutely nothing to do with how secure it is. The security issues in MapleStory are 100% due to the servers themselves allowing the client to tell the server what is happening, when the client is supposed to be nothing more than a dummy terminal interpreting what the server tells it is happening. The entire core logic the game was built on is flawed and has been a known game design flaw for decades. Any designer with half an ounce of brain knows that in a client->server relationship the server is the brain, not the client because the end user has absolute control over what the client tries to say/do. You can't have multiple subjective realities trying to assert truth over the server - The server needs to be an objective definition of reality or everything goes out the window.