Security testing is an assessment of the sensitivity of a software vulnerability to various attacks. What type of attacks? Mainly unauthorized breaches into the system with the aim of extracting data about users or getting confidential information. With the help of vulnerabilities present in the software code, attackers can achieve their objectives.  

An accidental or unintended flaw in any system or software code that makes it exploitable in terms of access to illegal users or malicious behaviors such as worms, trojans, viruses or any other malware is known as a security vulnerability. The use of software that has already been exploited or the use of default or weak passwords may also lead to making the system vulnerable.