Security testing is a type of software testing focused on identifying and addressing security vulnerabilities in a software application. Here I have shared five open source security testing tool.

1. Acunetix(Acunetix is an automated web application security testing tool that audits your web applications by checking for vulnerabilities like SQL Injection, Cross site scripting and other exploitable vulnerabilities)

Link: https://www.acunetix.com/

2. Burp Suite(Burp Suite is an integrated platform/graphical tool for performing security testing of web applications. Its various tools work seamlessly together to support the entire testing process, from initial mapping and analysis of an application's attack surface, through to finding and exploiting security vulnerabilities)

Link: https://portswigger.net/burp

3. Sqlmap(SQLmap is an open-source tool used in penetration testing to detect and exploit SQL injection flaws. SQLmap automates the process of detecting and exploiting SQL injection. SQL Injection attacks can take control of databases that utilize SQL.)

Link: https://sqlmap.org/

4. Zed Attack Proxy(The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding vulnerabilities in web applications)

Link: https://www.zaproxy.org/