OpenSea Says It Patched an NFT Phishing Vulnerability

The NFT marketplace said it fixed the loophole as soon as it was notified by a security firm and no accounts were compromised.

Oct 13, 2021 at 8:58 p.m. UTC
Updated Oct 14, 2021 at 1:12 p.m. UTC

OpenSea, a popular marketplace for non-fungible tokens, has closed an NFT phishing loophole discovered by Check Point Research, a division of publicly traded security firm Check Point Software Technologies.

  • Check Point wrote about the discovery in a blog post on Wednesday and outlined the scam in a video, saying that clicking pop-ups associated with malicious, airdropped NFTs could have provided access to customers’ wallets.
  • The company said that it notified OpenSea of the vulnerability on Sept. 26 and that OpenSea fixed the issue and verified the fix within an hour.
  • “It’s important to note had an attacker attempted to take advantage of this flaw, the end user would have needed to approve the malicious transaction through a wallet signature,” OpenSea wrote in its own blog post about the issue on Wednesday. It said it hadn’t been able to identify any instances where the vulnerability was exploited.
  • The phishing attack is a common tactic in the world of NFTs – thieves will send fishy tokens to public addresses on the Ethereum blockchain and wait for users to interact with them.
  • Scams are still pervasive on the platform, and throughout crypto in general, as CoinDesk outlined in this piece on NFT phishing schemes.


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Will Gottsegen is CoinDesk's media and culture reporter. He holds less than $500 in ETH, and less than $1000 in NFTs.