Someone I know made their credit card number available for a large audience. As described in this question, one can bill without CCV code.
So, given the card number and no other info (no CCV, no expiry date, no card holder name - she's not the card owner), can someone do any harm / purchase stuff using the card? Basically, what could be the consequences if someone is ill-minded and has resources?
I suppose expiry date is not a big deal since there are not many options (usually cards expire in 24 months, right?).