Global entertainment ticketing service Ticketmaster has admitted that the company has suffered a security breach, warning customers that their personal and payment information may have been accessed by an unknown third-party.

The company has blamed a third-party support customer service chat application for the data breach that believed to affect tens of thousands of its customers. The customer support chat application, made by Inbenta Technologies—a third-party artificial intelligence tech supplier—used to help major websites interact with their customers.

In its statement, Ticketmaster said it discovered malicious software on the customer support application hosted on its UK website that allowed attackers to extract the personal and payment information from its customers buying tickets.
Ticketmaster said that it has emailed all affected customers, and is offering 12 months of free identity monitoring service for those who have been impacted.

Affected customers are also advised to keep a close eye on their bank account transactions for signs of any suspicious activity, and immediately notify their banks if found any.

Users are also advised to be cautious if they receive any suspicious or unrecognized phone call, text message, or email from anyone saying you must pay taxes or a debt immediately—even if they provide your personal information.