The popularity of web applications is constantly growing as businesses and corporations host several services through them. However, companies and businesses that do have web applications still face the threat of vulnerabilities. A vulnerability is a flaw in your system that hackers may exploit to obtain unauthorized access, run malicious code, install malware, and perhaps steal sensitive information. Remediating these attacks could be near impossible, especially since most small businesses, corporations, and even daily users lack the resources to fix several vulnerabilities at a time.

Source: LXer – Complete Guide to Vulnerability Basics