Is an attack in which malicious code is introduced into an application. this type of attack is possible because of lax input validation in the target application.

Code injection

Explanation:Code injection is the faulty code that is introduced in the programs of computer system by the attackers so that they can change the execution process and outcome. It is done so that the programs can initially be exploited.

Due to the lack of validation in the program's input and output , it makes it easy for the attackers to introduce/injected the mal-code in program.