Performing Second-Order SQL Injection

When to Use

• When first-order SQL injection testing reveals proper input sanitization at storage time
• During penetration testing of applications with user-generated content stored in databases
• When testing multi-step workflows where stored data feeds subsequent database queries
• During assessment of admin panels that display or process user-submitted data
• When evaluating stored procedure execution paths that use previously stored data

Prerequisites

• Burp Suite Professional for request tracking across application flows
• SQLMap with second-order injection support (--second-url flag)
• Understanding of SQL injection fundamentals and blind extraction techniques
• Two or more application functions (one for storing data, another for triggering execution)
• Database error message monitoring or blind technique knowledge
• Multiple user accounts for testing stored data across different contexts

Workflow