SQL Injection (SQLi) remains one of the most critical and widespread security vulnerabilities affecting web applications today, posing severe risks to data confidentiality, integrity, and availability. This vulnerability arises when attackers exploit improper input validation in web applications to inject malicious SQL code into backend databases. By doing so, they can manipulate queries, bypass authentication, retrieve sensitive information, alter or delete data, and even execute administrative operations on the database server. Given the potentially devastating consequences of successful SQLi attacks—ranging from data breaches and identity theft to full system compromise—identifying and mitigating these vulnerabilities is paramount for any security-conscious organization or individual responsible for maintaining web infrastructure.