A web application security audit is a systematic evaluation process used to identify, analyze, and mitigate security vulnerabilities present in a web application. It ensures that the application protects sensitive information, maintains data integrity, and provides secure services to users. With the increasing dependence on web-based systems for business, banking, healthcare, and communication, security auditing has become an essential component of web application testing and maintenance. The fundamental objective of a web application security audit is to assess the application’s security posture by examining its design, implementation, configuration, and operational practices. The audit focuses on identifying weaknesses that could be exploited by attackers and recommending appropriate security measures. It helps organizations prevent unauthorized access, data breaches, malware attacks, and other cyber threats. A major component of security auditing is vulnerability assessment. In this process, auditors examine the web application for common security issues such as SQL injection, cross-site scripting (XSS), cross-site request forgery (CSRF), insecure authentication mechanisms, improper access control, and sensitive data exposure. Automated vulnerability scanners and manual testing techniques are used together to detect potential risks. Authentication and authorization testing are important aspects of a web application security audit. Auditors verify whether user identity verification mechanisms are strong and