Any hack that is currntly working can be found here;
CrossFire Hacks - MPGH - MultiPlayer Game Hacking
If the title is crossed out that means the hack was not approved or it is currently detected. If you are using an undetected hack use this thread to find some common problems;
https://www.mpgh.net/forum/243-crossf...esnt-work.html
If you receive errors such as "Disconnected from Server" or "Incorrect Map Info", After following the thread above, The hack is more than likely Detected. Please wait for a new release, which can be found in the original "Crossfire Hacks" link given above. If you continue to inject a detected hack you may risk becoming banned.