StockX, the leading online marketplace for retro sneakers, has fallen victim to a data breach, allegedly exposing sensitive information of more than 6.8 million users worldwide.

TechCrunch learned through a black market data seller that a hacker stole 6.8 million records from the shoe trading site in May, including names, e-mail addresses and hashed passwords. Shoe sizes, trading currencies and device version profiles were also stolen. TechCrunch verified the claims by contacting users from a sample of 1,000 records using information only they would know.

StockX later confirmed that it suffered a breach to Engadget and issued a statement

The full statement is below:

“StockX cares deeply about the privacy of our customers. In recent days, our company has discovered a data security issue, and we want to provide you with an update on this situation.

“We were alerted to suspicious activity potentially involving customer data. Upon learning of the suspicious activity, we immediately launched a comprehensive forensic investigation and engaged third-party data incident and forensic experts to assist. Though our investigation remains ongoing, forensic evidence to date suggests that an unknown third-party was able to gain access to certain customer data, including customer name, email address, shipping address, username, hashed passwords, and purchase history. From our investigation to date, there is no evidence to suggest that customer financial or payment information has been impacted.

“While conducting our forensic investigation into the suspicious activity, and out of an abundance of caution, we implemented immediate infrastructure changes to mitigate and address any potential effects of the suspicious activity. These infrastructure changes included:

  • a system-wide security update;
  • a full password reset of all customer passwords with an email to customers alerting them about resetting their passwords;
  • high-frequency credential rotation on all servers and devices; and
  • a lockdown of our cloud computing perimeter

“We want you to know that we took these steps proactively and immediately, because we had just begun our investigation and did not yet know the nature, extent, or scope of suspicious activity to which we had been alerted. Though we had incomplete information, we felt a responsibility to act immediately to protect our customers while our investigation continued—and we took steps to do so.

“Again, we take data security and privacy very seriously, and will continue to communicate with our customers and work hard to protect those who trust us with their shopping experience.”