Thread:Project:Support desk/Wiki hacked for info/reply

Please follow Manual:Security. Especially do not disclose details about the hack to the public (including myself).

Note that your MediaWIki version is outdated and has known security holes. Given that there are quite a number of known security related issues in the version you used, which might give an attacker possibilities to manipulate files on the server, I guess it's unlikely that a yet unknown zero-day exploit has been used. Anyway, you cannot be sure about that until you figured out how the attack actually worked.