MakerBot’s Thingiverse, a website where users can share 3D printing templates and designs, was recently the victim of a major data breach that resulted in the exposure of over 2 million users’ passwords and email addresses.

The breach was initially reported to have affected 228,000 email addresses, but TJ Horner, a software engineer who worked at MakerBot, analyzed the leaked data and found that it actually affects more than 2 million users. Horner added that the breach includes OAuth tokens that may have been used to remotely access and take control of MakerBot printers.

Thingiverse posted a statement regarding the data breach on Twitter, but their view of the scope of the breach — specifically the number of users affected — is much smaller than seems to be the case.

Thingiverse claims that less than 500 users were affected but in addition to TJ Horner, Troy Hunt, the creator of HaveIBeenPwned.com, believes otherwise. HaveIBeenPwned provides notifications to users when their email addresses are part of known breaches, and Troy has confirmed that the Thingiverse breach has affected far more than only 500 users. Troy stated on Twitter that at least 10,646 HaveIBeenPwned users were notified of the breach and a lot of them have been confirmed as Thingiverse users, too.

As of right now, it does in fact appear that 2,292,189 Thingiverse records have been exposed, including people’s email addresses, passwords, full names, usernames, addresses, IP addresses, and birthdates. Thingiverse users are advised to change their passwords as well as the passwords of their other accounts that share the same email or password to avoid any further security issues.

Leaked data can be used by cybercriminals in many ways

• Identity theft.
• Targeted phishing attacks.
• Brute-force attacks to try and gain full access to online accounts.
• SIM swap attacks, which allow hackers to get around multi-factor authentication.
• Smishing attacks, which are used to trick victims into revealing additional personal information.

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