As far as the virtual criminal world is concerned a valid cc refers to the data swiped from the magnetic band at the back of a debit or a credit card, which afterwards might be sold to the interested parties or used for personal enjoyment. It usually provides the card issuer’s identity by means of the INN (issuer identification number) and, secondly, the account number (PAN).
A carding forum is a place where one can illegally interchange or obtain details of a stolen credit card, usually this type of sites are concealed in the depth of the dark web, where all the shared information is encrypted, for example using TOR routing, and payments for transactions are carried out through cryptocurrencies in order to prevent ordinary people from getting access to it.
You might never hear of a CVVStore before you come across a credit card forgery or, worse, an identity theft issue related to yourselves or any of your relatives and friends. These places host all the necessary a cybercriminal needs, such as credit card number, expiration date, full information about the cardholder, including their name or zipcode, to forge a fake credit card and use it illegally online.