Submitted by TomFrenchBlockchain
Potentially frozen or purposefully inaccurate USDV:VADER price feed.
https://github.com/code-423n4/2021-11-vader/blob/3a43059e33d549f03b021d6b417b7eeba66cf62e/contracts/twap/TwapOracle.sol#L322
Only the owner of TwapOracle can call update on the oracle. Should the owner desire they could cease calling update on the oracle for a period. Over this period the relative prices of VADER and USDC will vary.
After some period timeElapsed the owner can call update again. A TWAP is a lagging indicator and due to the owner ceasing to update the oracle so timeElapsed will be very large, therefore were averaging over a long period into the past resulting in a value which may not be representative of the current USDV:VADER exchange rate.
The owner can therefore selectively update the oracle so to result in prices which allow them to extract value from the system.
Remove the permissioning from TwapOracle.update
SamSteinGG (Vader) marked as duplicate 
alcueca commented:
SamSteinGG (Vader) commented:
