http://www.cryptoarticles.com/crypto-news/bitstamp-user-accounts-potentially-breached-withdrawals-halted-for-nowWe have received reports claiming Bitstamp LTD, one of the most popular Bitcoin exchanges to date, may have been breached. As a result of this breach, customers are advised not to send any funds to Bitstamp hot wallets, and customer details may have been compromised as well. Up until now, we do not know the extent of this potential breach, but here is what we do know.
EDIT : logging in with a 2FA enabled account returns a 403 : Forbidden error