SQL Injection

SQL Injection Prevention Guide

HxHippy

27 Nov 2025 — 1 min read

SQL injection remains one of the most dangerous web application vulnerabilities, consistently appearing in the OWASP Top 10.

How SQL Injection Works

SQL injection occurs when untrusted data is sent to an interpreter as part of a command. Attackers can:

Bypass authentication
Access, modify, or delete database contents
Execute administrative operations
Read files from the system

Types of SQL Injection

Classic SQLi: Directly manipulating queries through user input.

Blind SQLi: Inferring data through true/false responses or time delays.

Second-Order SQLi: Payload stored and executed later.

Prevention Techniques

Parameterized Queries: Never concatenate user input into SQL
Stored Procedures: Use parameterized stored procedures
Input Validation: Whitelist acceptable patterns
Least Privilege: Minimal database permissions
WAF Rules: Detect and block SQLi attempts

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