OpenSea NFT users report massive email phishing campaign

Users of the major nonfungible token (NFT) marketplace OpenSea have said they are being targeted with a new email phishing attack, and have received emails containing malicious links from attackers posing as the marketplace itself.

According to social media reports, OpenSea users and developers have been targeted by various email phishing campaigns, including a fake developer account risk alert and a fake NFT offer.

One OpenSea developer took to X (formerly Twitter) on Nov. 13 to report receiving a phishing attempt to an email strictly dedicated to their OpenSea Application Programming Interface (API) key. “In other words, dev contacts have been exfiltrated from OpenSea and are the real target in this campaign,” the poster said.

The social media report came in response to OpenSea’s insistence that the platform has not been hacked and urging users not to click on links they don’t trust.

Correct- there is no smart contract vuln. But unfortunately for @opensea I just received a phishing attempt, to an email that was strictly dedicated to my OpenSea API key. In other words, dev contacts have been exfiltrated from OpenSea and are the real target in this campaign https://t.co/GD4UgwWIrx pic.twitter.com/rtyUJBMlwl

— Quantity (@quantity) November 13, 2023

Another OpenSea user took to Reddit to express confusion about the ongoing phishing campaign on Nov. 14.

“Haven’t used OpenSea for years and all of a sudden, I keep getting emails talking about my NFT listings getting offers,” the poster wrote, adding that all the vulnerable links were trying to direct the reader to install a malicious app.

“Right now I’m getting 3-4 scam/phishing emails a day which is crazy since I got zero just a few weeks ago,” the Redditor wrote, adding:

“So my question is did something new happen to OpenSea. The email address of mine they are hitting is one I created specifically for OpenSea so not concerned but I know OpenSea had hacks previously. Are they just now hitting up my email or is there a new one?”

The news comes a few weeks after one of OpenSea’s third-party vendors experienced a security incident that exposed information related to user API keys. OpenSea reported the breach in a notification email to affected users in late September 2023, stating that user emails and developer API keys may have been leaked due to the attack.

Choose your third party well…
Opensea posted that a vendor was attacked, resulting in the leak of developers’ API keys!
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