Submitted by 0xRajeev, also found by 0xsanson and leastwood.
Admin role has absolute power across Swivel, Marketplace and VaultTracker contracts with several onlyOwner functions. There is no ability to change admin to a new address or renounce it which is helpful for lost/compromised admin keys or to delegate control to a different governance/DAO address in future.
The project does not use the widely used OpenZeppelin Ownable library which provides transfer/renounce functions to mitigate such compromised/accidental situations with admin keys. This makes admin role/key a single-point of failure.
Manual Analysis
Ensure admins are reasonably redundant/independent (3/7 or 5/9) multisigs and add transfer/renounce functionality for admin. Consider using OpenZeppelins Ownable library.
JTraversa (Swivel) acknowledged:
