OpenSea Data Breach: Customer Emails Stolen by Third Party

In June 2025, OpenSea, a popular NFT marketplace, had a serious data breach. An employee of OpenSea’s email delivery partner Customer.io leaked customer emails to a third-party. The NFT platform has warned users that there is now “a” potential risk of phishing scams targeting them.

OpenSea, one of the world’s most popular marketplace for non-fungible tokens (NFTs), has been breached, with sensitive user data stolen. The company confirmed An employee of OpenSea’s email delivery partner Customer.io leaked customer emails to a third-party.

OpenSea – which happens to be one of the largest NFT marketplaces in the world – initially alerted its customers to the breach on J, during which it identified that email addresses had been compromised. The company, 27 de sept. de 2025 OpenSea, one of the world’s most popular marketplace for non-fungible tokens (NFTs), has been breached, with sensitive user data stolen. The company confirmed. The leak originated at Customer.io, the company that handles OpenSea’s emails.

What Happened in the OpenSea Data Breach?

The OpenSea data breach, stemming from a leak at Customer.io, resulted in customer emails stolen by a third party. Users are urged to be extremely cautious of unsolicited emails and messages asking for personal information or directing them to click on links. This includes emails appearing to be from OpenSea itself.

Protecting Yourself After the OpenSea Email Leak

Following the OpenSea data breach involving Customer.io, vigilance is key. Be skeptical of any communications asking for your seed phrase, password, or other sensitive details. Enable two-factor authentication wherever possible and report any suspicious activity to OpenSea immediately.