The built-in EVM pre-compiled ecrecover featured in SignatureChecker.sol(https://github.com/code-423n4/2022-11-looksrare/blob/main/contracts/SignatureChecker.sol) is susceptible to signature malleability due to non-unique v and s (which may not always be in the lower half of the modulo set) values, possibly leading to replay attacks. Elsewhere if devoid of the adoption of nonces, this could prove a vulnerability when not carefully used.
Consider using OpenZeppelins ECDSA library which has been time tested in preventing this malleability where possible.
