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SQL Injection Basics _ this is a test

Understanding the fundamentals of SQL injection attacks and exploitation techniques.

SQLiWeb SecurityExploitation

SQL Injection Basics

SQL Injection is one of the most critical web application vulnerabilities. This note covers the fundamental concepts and basic exploitation techniques.

What is SQL Injection?

SQL Injection occurs when an attacker can insert malicious SQL code into a query, manipulating the database logic.

Basic Example

SELECT * FROM users WHERE username = 'admin' OR '1'='1' -- ' AND password = 'anything'

Common Payloads

  • ' OR 1=1--
  • admin'--
  • ' UNION SELECT NULL--

Prevention

Always use prepared statements and parameterized queries.