About 885 million documents, including bank account numbers, mortgage records, Social Security numbers, drivers’ license images and tax records, have been leaked by First American Financial Corp.’s website.’

Anyone with a web browser and a URL for a legitimate document could access the real estate title company’s records, according to a report by KrebsOnSecurity, which noted many of the documents related to wire transactions involving property buyers and sellers.

“At first glance it appears that this vulnerability is an insecure direct object reference (IDOR) because the developer who found the vulnerability stated that he was retrieving different documents by simply changing the document number,” said Jon Bottarini, hacker and lead federal technical programs manager at HackerOne. “Modifying the document number in his link by numbers in either direction yielded other peoples’ records before or after the same date and time.”

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