Although The Idols boasts of two audits from several years ago, the contract containing the vulnerability may not have been audited.
The Idols NFT loses $324,000 to exploit
An attacker noticed a vulnerability in a smart contract for The Idols, an NFT project that also incorporates ETH staking functionality. They discovered that a function used to distribute rewards had a bug when the sender and recipient addresses were the same, allowing a holder to repeatedly claim rewards. By taking advantage of this bug, they were able to siphon 97 stETH (~$324,000) from the project.
- "The Idols NFT", Rekt [archive]