https://github.com/code-423n4/2023-10-party/blob/b23c65d62a20921c709582b0b76b387f2bb9ebb5/contracts/crowdfund/InitialETHCrowdfund.sol#L318
https://github.com/code-423n4/2023-10-party/blob/b23c65d62a20921c709582b0b76b387f2bb9ebb5/contracts/crowdfund/InitialETHCrowdfund.sol#L350
The InitialETHCrowdfund contract is meant to be used through a proxy, and many of its methods are decorated with the onlyDelegateCall modifier. However, several others dont, so they can be called directly.
Also, the Party contract and its parents are supposed to be used via a proxy, but they dont implement any onlyDelegateCall modifier.
Consider adding the onlyDelegateCall modifier to:
Also, add an ad-hoc modifier that allows delegate calls and regular calls where msg.sender == address(this) to refund to allow multicalls.
Note that this applies to several initializers too, but this is reported separately with higher impact.
