OpenSea is the largest marketplace for non-fungible tokens (NFT). This week, they announced that Customer.io employees accessed and downloaded the company's email list.

They stated that anyone who previously shared their email address on the platform should assume they are affected.

"Please be aware of malicious actors trying to contact you using an address that looks visually similar to our official email domain, opensea.io (such as opensea.org) or any other variation," the company stated to its users in a statement regarding the data leak.

Paul Laudanski is the head of threat intelligence for Tessian email security company. He says insider abuse can be challenging to find, even if an authorized user is involved. 

He recommends that all organizations should review third-party risk management protocols to ensure they have a clear understanding of where and how data is stored

According to OpenSea, the company cooperates with law enforcement to investigate this incident.

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