For the past few years, we have seen a rapid development of the Internet all over the world which produces significant demand for web applications with strict security necessities.
Modern web systems are really complex, distributed, diverse, ever-evolving, and speedily changing whereas the web domain is extensive and dynamic in nature that makes it more subject to malicious actions like virus attacks, threats, etc. thus security becomes a critical issue and is also related to the quality of web applications.
An agile team has to integrate Security testing with the Development phase for detecting Security vulnerabilities from an early stage of the application lifecycle and addressing them before deployment.