Understanding SQL Injection and How to Prevent It

SQL injection remains one of the most damaging and longest-standing web vulnerabilities, despite being entirely preventable with correct coding practices.

How It Works

An attacker inserts malicious SQL code into an input field (like a login form), tricking a poorly written application into executing unintended database commands — potentially exposing or destroying all your data.

The Fix: Parameterized Queries

Using parameterized queries (or prepared statements) instead of directly inserting user input into SQL commands eliminates this vulnerability entirely, since user input is never treated as executable code.

Why It Still Happens

Older code, custom scripts written without security review, and outdated plugins are the most common sources of SQL injection vulnerabilities on otherwise modern websites.

Further Reading

• SSL Certificates
• Talk to Our Security Team
• Get Cyber Safe – Government of Canada