SQL Injection Prevention: Parameterized Queries
How SQL injection works, why string concatenation is always wrong, and how parameterized queries and ORMs eliminate the attack surface.
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Tags: security, web, sql
SQL Injection Prevention: Parameterized Queries and ORMs SQL injection has been on the OWASP Top 10 since the list began. Despite being one of the oldest known web vulnerabilities — and one with a complete, well-understood fix — it continues to cause major breaches. The fix is not complex: never interpolate user input into SQL strings. Use parameterized queries. This guide shows the vulnerable pattern, the fix, and how ORMs help. What SQL Injection Is SQL injection occurs when user-supplied data is incorporated into a SQL query without sanitization. The database cannot distinguish between the query structure and the injected data — it executes both. Classic example: a login form that builds a query by concatenating the username: More destructive: the injection, which returns data from…
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