Submitted by csanuragjain, also found by Lambda
AuctionCrowdfund contract is designed in a way to allow bidding max upto maximumBid. But due to a flaw, anyone (including NFT seller) can make sure that CrowdFund bid always remain equal to maximumBid thus removing the purpose of maximumBid. This also causes loss to Party participating in this Auction as the auction will always end up with maximumBid even when it could have stopped with lower bid as shown in POC.
maximumbid concept can easily be bypassed as shown above and will not make sense. Either remove it completely
OR
bid function should only be callable via crowdfund members then attacker would be afraid if new bid will come or not and there should be a consensus between crowdfund members before bidding which will protect this scenario.
merklejerk (PartyDAO) acknowledged and commented:
HardlyDifficult (judge) commented:
0xble (PartyDAO) confirmed and resolved:
