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SQL Injection

Manipulate database queries. Extract data. Execute commands. OWASP Top 10 #1 vulnerability.

IntermediateInteractive Dual Perspective

SQL Injection

#1 on OWASP Top 10 - Database Exploitation

Requires: Web application access • Difficulty: Low • Impact: Critical

💻 Desktop Experience Available

View this module on desktop for an interactive SQL Injection exploitation simulation.

SQL Injection (SQLi) is a web application vulnerability that occurs when untrusted user input is directly concatenated into SQL queries without proper sanitization. Attackers can inject malicious SQL code to manipulate database queries, extract sensitive data, and even execute operating system commands on the database server.

How SQL Injection Works (Vulnerable Code):

$query = "SELECT * FROM users WHERE username = '" . $_GET["username"] . "'";

User input is directly concatenated into SQL query. No validation or parameterization.

If user enters: admin' OR '1'='1

SELECT * FROM users WHERE username = 'admin' OR '1'='1'

This returns all users because '1'='1' is always true.

Attack Impact:

  • Data Extraction: Dump entire databases, including passwords, credit cards, PII
  • Authentication Bypass: Login without valid credentials
  • Privilege Escalation: Gain admin access to application
  • OS Command Execution: Execute commands on database server (if privileged)
  • Data Manipulation: Modify or delete data

Why It's Still #1 on OWASP Top 10: Despite being known since 1998, SQL injection remains the most common web vulnerability. Many developers still use string concatenation instead of parameterized queries. Legacy applications often have SQLi vulnerabilities that are difficult to fix.

Legal & Ethical Warning

SQL Injection techniques should only be used in authorized penetration testing, bug bounty programs, or controlled lab environments. Unauthorized access to databases is illegal under CFAA and equivalent laws worldwide. Always obtain written permission before testing.

Operation Glass House

Target: Corporate Database // Vector: SQL Injection

SQLMAP_CONSOLE
SQLMAP AUTOMATION SUITE v1.7.3
TARGET: http://internal-db.corp.local/login.php
Backend Query Inspector
// Executed on Server
SELECT * FROM users WHERE username = '$INPUT' AND password = '...'
Database Schema
users
id
username
password
role
secrets
id
project
access_code
Access Denied
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