Just yesterday, OpenSea announced a smart contract upgrade, which requires users to migrate their listed NFTs from Ethereum (ETH) blockchain to a new smart contract. As a direct result of the upgrade, users that don’t migrate over from Ethereum risk losing their old, inactive listings — which currently require no gas fees for migration.

Major nonfungible token (NFT) marketplace OpenSea has reportedly fallen victim to an ongoing phishing attack within hours after announcing a week-long planned upgrade to delist inactive NFTs on the platform. 

However, the urgency and short deadline opened up a small window of opportunity for hackers. Within hours after OpenSea’s upgrade announcement, reports across multiple sources emerged about an ongoing attack that targets the soon-to-be-delisted NFTs.

Further investigations revealed that attackers used phishing emails to steal the NFTs before they get migrated over OpenSea’s new smart contract. Once a user authorizes the NFT migration from the fraudulent email, the attackers gain access to the NFTs.

Users are…


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