Submitted by Udsen, also found by 0xkazim, pipoca, 0xNineDec and 0xnacho.
Reentrancy attack could happen if _feeTo is a malicious contract and has recieve() function implemented in _feeTo contract. FeeWrapper._chargeFeePayable() function is used to send the _feeAmount of ETH to the _feeTo address.
Consider that FeeWrapper._chargeFeePayable() is called by the FeeWrapper._rubicallPayable() function with the necessary _feeParams input parameter, and the following scenario can occur:
https://github.com/code-423n4/2023-04-rubicon/blob/main/contracts/utilities/FeeWrapper.sol#L108-L121
https://github.com/code-423n4/2023-04-rubicon/blob/main/contracts/utilities/FeeWrapper.sol#L76-L89
Manual Review and VSCode
Two options can be recommended to mitigate this issue:
daoio (Rubicon) confirmed via duplicate issue #495
