What is SQL injection and how can I prevent it?

What is SQL injection and how can I prevent it?

SQL injection is a code injection technique that exploits vulnerabilities in an application's software by manipulating SQL queries. To prevent it, you should use prepared statements, parameterized queries, and input validation.

Can you give me an example of how an SQL injection attack works?

Sure! For instance, if a login form directly includes user input in an SQL query without validation, an attacker could input something like ' OR '1'='1' to bypass authentication.

What are the common signs that my application is vulnerable to SQL injection?

Common signs include error messages revealing database information, unexpected behavior in the application, and slow performance during database queries.

How can I test my application for SQL injection vulnerabilities?

You can use tools like SQLMap or Burp Suite to automate testing for SQL injection vulnerabilities, or perform manual testing by trying various payloads.