A reported vulnerability on the NFT Marketplace OpenSea means a user may have made profits in the hundreds of Ether. Here’s what you need to know.
PeckShield Alert shared the details of a “front-end issue” on OpenSea, one which allegedly let an exploiter earn at least around 332 Ether.
<p lang=«en» dir=«ltr» xml:lang=«en»>It appears that @opensea has a front-end issue and the exploiter gained about 332 Etherhttps://t.co/35kCB1n7nv— PeckShieldAlert (@PeckShieldAlert) January 24, 2022
What is even more interesting is that Etherscan flagged the users’ address for unnatural activity.
Source: EtherScan
While the exact technical details of the exploit are unclear, some users have theorized that it might be linked to delisted NFTs being moved from OpenSea to Rarible, possibly to avoid gas fees. Due to differences in the way prices are handled on the two interfaces, an exploiter allegedly bought delisted – but not fully cancelled – NFTs at low prices before selling them for huge profits.
One user was shocked when their NFT sold at a price far below its market value.
<p lang=«en» dir=«ltr» xml:lang=«en»>GUYS WHY DID MY APE JUST SELL FOR .77??????— TBALLER.eth (@T_BALLER6) January 24, 2022
Another user referenced by Etherscan provided some tips for other OpenSea traders to keep their NFTs safe. This included properly cancelling de-listed NFTs when moving them between wallets.
<p lang=«en» dir=«ltr» xml:lang=«en»>Your #NFTs are at risk if you: ➀ Listed them on OpenSea ➁ Transferred them to another wallet without canceling the listing on OpenSea ➂ Sent them back to your original wallet later on Exactly what @T_BALLER6 did in May 2021. pic.twitter.com/O3PVle1zHq— lut1 (@_lut1) January 24, 2022
When the vulnerability was being discussed as
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