What is SQL Injection? SQL Injection (SQLi) is one of the most common and dangerous types of attacks against web applications. It occurs when an attacker manipulates an application's SQL queries by injecting malicious SQL code into input fields, URL parameters, or cookies. If an application does not properly validate or sanitize user input, it can allow attackers to modify the intended query, resulting in unauthorized access, data leaks, or even full control over the database. In SQL injection attacks, the attacker inserts or manipulates SQL statements to achieve malicious results. This can include viewing or manipulating data, bypassing authentication, or even deleting the database. How SQL Injection Works When a user submits input, such as in a login form, the application typically constructs an SQL query to retrieve data from the database. If the input is not properly sanitized, the attacker can add malicious code to the query. For example, in a login form, a query might look ...
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