Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
express-mock-middleware is vulnerable to Prototype Pollution. Exported functions by the package can be tricked into adding or modifying properties of the `Object.prototype`. Exploitation of this vulnerability requires creation of a new directory where an attack code can be placed which will then be exported by `express-mock-middleware`. As such, this is considered to be a low risk.
CWE-1321 - Prototype Pollution