A Reuters report said Uber's bug bounty programmes, normally used to reward researchers for the submission of information about flaws in a firm's software, was hosted by HackerOne, which also offers its platform to other technology companies.
The chief executive of HackerOne, Marten Mickos, is a well-known former chief executive of MySQL, the Finnish database company that was bought by Sun Microsystems and then became part of Oracle when it bought Sun.
Mickos said he could not discuss an individual customer's programmes. "In all cases when a bug bounty award is processed through HackerOne, we receive identifying information of the recipient in the form of an IRS W-9 or W-8BEN form before payment of the award can be made," he said.
At that time, Uber chief executive Data Khosrowshahi said: ""None of this should have happened, and I will not make excuses for it. We are changing the way we do business."
The report said there was no clue as to the identity of the attacker who was said to be from Florida. Uber spokesman Matt Kallman refused to comment.
As to who authorised the payment, nothing is known, apart from the fact that former Uber chief executive Travis Kalanick was aware of both the breach and the payout in November 2016.
Uber is said to have paid the money to confirm the attacker's identity and make him sign a non-disclosure agreement. The company also checked the man's machine to ensure that the data had been erased.
Uber suffered a data breach in 2014 as well and was discussing a settlement with the FTC while it haggled with the Florida hacker to keep the 2016 breach quiet.