Common Security Mistakes in Web Applications

Even experienced developers can make simple security mistakes that lead to major breaches.

1. Trusting Client-Side Validation

Never rely on JavaScript for security. Always re-validate everything on the server.

2. Improper Error Handling

Detailed error messages can reveal database structures, file paths, and server versions to an attacker.

3. Insecure File Uploads

Allowing users to upload files without proper validation can lead to Remote Code Execution (RCE) if an attacker uploads a script.

4. Lack of Rate Limiting

Without rate limiting, your application is vulnerable to brute-force attacks on login forms and API endpoints.