Glossary
SQL Injection
When you fill out a form on a website, your input goes to a database. SQL injection is when hackers type special code instead of normal text, tricking the database into giving up secrets or letting them in. It's one of the oldest and most common web attacks.
What is SQL Injection?
A code injection attack that exploits security vulnerabilities in web applications by inserting malicious SQL statements into input fields to manipulate or access the database.
Why Should You Care?
SQL Injection remains one of the most dangerous attack vectors because it can give attackers direct database access—allowing them to steal customer records, financial data, and sensitive business information in a single breach. Organizations face severe consequences including regulatory fines (GDPR, HIPAA), reputational damage, and loss of customer trust. Developers who fail to use parameterized queries and sanitize input expose their entire backend, making this a critical vulnerability for any application handling databases.
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Real-World Example
In a classic SQL injection attack, a login or search field that builds database queries from raw user input lets an attacker enter crafted text (such as ' OR '1'='1) that alters the query's logic—bypassing authentication or dumping entire tables of customer data. A vulnerable product-search parameter, for example, can be manipulated to return every record in a database, including usernames, hashed passwords, and payment details, which is why input validation and parameterized queries are foundational defenses.
How to Protect Against SQL Injection
- 1.
Use parameterized queries in all database code
- 2.
Validate and sanitize all user inputs
- 3.
Run SQL injection scanning tools
Related Terms
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