Build a SQL Injection Prevention Mechanism for Web Applications

SQL Injection is one of the most dangerous and common web vulnerabilities, allowing attackers to manipulate backend databases and steal or corrupt data. Preventing SQLi is critical for protecting user information and maintaining application integrity.

The prevention system focuses on validating user input, avoiding dynamic queries, enforcing parameterized statements, and optionally implementing an ORM layer to handle secure query building. It also includes a detection layer that flags suspicious patterns.

Whenever a user submits a form or query input, the system validates the data type, format, and structure. Instead of inserting raw user input into queries, the backend uses placeholders or ORM models that escape dangerous characters, ensuring no malicious SQL code is executed.

• Receive user input through login forms, search boxes, or parameters.
• Run the input through a validation and sanitization pipeline.
• Bind the cleaned input to prepared statements or ORM model functions.
• Flag and log suspicious attempts using common SQLi payload detection rules.
• Return user-friendly errors without exposing database info.

• OWASP SQL Injection Prevention Cheat Sheet
• Sequelize ORM Documentation
• SQLAlchemy Documentation
• Node.js Express Security Best Practices
• OWASP ESAPI for Java