On Monday, Australian security expert Shubham Shah revealed the existence of a Coinbase bug that could be leveraged by cybercriminals for targeted phishing attacks. The Bitcoin wallet service still thinks the issue doesnt pose a security risk, but the company has taken some steps to limit potential attacks. Shah has found that due to the fact that unlimited money requests can be sent by Coinbase users, an attacker could send specially crafted requests that could enable him/her to deter…