thinking of purchasing this to replace the one that's just been shown to be exploitable, could anyone tell me if this is safe to use? or vulnerable too?
If you are speaking about this :
https://bitcointalk.org/index.php?topic=1137965.0 then I guess yes it should be safe to use ,I got a vouch copy before and you can read my review & more about it .
However I think you should care more about the service since it seems like the topic is closed and OP didn't connect since August .