Integer Overflow or Wraparound
The mintToken function of a smart contract implementation for Crystals, an Ethereum token, has an integer overflow that allows the owner of the contract to set the balance of an arbitrary user to any value.
CWE-190 - Integer Overflow or Wraparound
The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.