Is a Dropdown Immune to SQL Injection Attacks?

Question:

Despite understanding the risks of SQL injection from untrusted user input, is a dropdown-based form, where users select from predefined options, exempt from this vulnerability?

Answer:

Unfortunately, even with dropdowns, you cannot assume immunity to SQL injection attacks. Here's why:

Even though the dropdown options are limited, users can manipulate data in the browser or use tools like curl to send custom HTTP requests to submit unwanted input. For example, in Firefox's developer console, it's easy to edit dropdown values, including those that contain malicious SQL statements like "DROP TABLE *;".

By avoiding these manipulations and custom requests, the suggestion to "ALWAYS protect yourself" remains paramount. Never assume user input, even from controlled sources like dropdowns, is safe. Always implement necessary security measures to prevent SQL injection and protect your databases.