What to know about the purported theft of Ticketmaster customer data CBS NewsHacking group claims it breached Ticketmaster and stole data for 560 million customers CBS NewsHackers claim Ticketmaster data breach, offer info of 560 million customers for sale Fox BusinessTicketmaster hacked. Breach affects more than half a billion users. MashableTicketmaster Hit With Class Action Over Alleged Hacking Incident Bloomberg Law