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On June 29, OpenSea, the world’s largest NFT marketplace, announced in a blog post that it had suffered a major data breach.

The company, which is a peer-to-peer marketplace for crypto collectibles and non-fungible tokens, stated that the breach happened after an employee of its email vendor,, used their employee access to download OpenSea users’ email addresses and shared them with an unauthorized external third party.

The data breach comes just a few months after the company refunded $1.8 million to its users after people exploited a loophole that allowed them to purchase valuable NFTs at well below their market value.
OpenSea, along with, is currently investigating the incident, which has already been reported to law enforcement. However, the company did advise that anyone who has ever shared their email address with OpenSea should assume they’ve been impacted by the breach and be on the alert for email scams.

OpenSea has also been informing its users about the breach through email.
The company shared some excellent safety tips for those affected to follow (source: OpenSea):
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