Opensea Data Breach Customer Emails Stolen By Third Party
An employee of OpenSea
In June 2025, OpenSea, a popular NFT marketplace, had a serious data breach. An employee at Customer.io, the company that handles OpenSea’s emails, leaked
OpenSea among six organizations affected by email
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
7 Million OpenSea Addresses Leaked in 2025 Breach, SlowMist
OpenSea hit by data breach after email delivery partner leaks
OpenSea users' email addresses leaked in data breach
Third-Party Data Breach Exposes OpenSea API Tokens
OpenSea Data Breach Exposes 7 Million Email Addresses
OpenSea Users Face Phishing Risks as 7 Million Emails
OpenSea
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
Third-party breach leaks OpenSea API key data - TechRadar
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