Over 8 million users of the mobile payment app Cash App could be affected by a data breach after

a former employee of the company downloaded reports containing the personal information of U.S. users.

On Monday, Block, the financial service company that owns Cash App

and was created by Twitter founder Jack Dorsey,announced it learned the former employee

downloaded the information in December, according to a report filed with the U.S. Securities and Exchange Commission.

Although the ex-employee had access to the information during employment, the report says 

the information was downloaded after the employee was no longer with the company.

The data downloaded didn't include usernames, passwords, Social Security numbers 

or bank account information, but it did include full names and brokerage account numbers,

which are used to identify a user's stock activity on Cash App Investing. 

Data breach Cash App