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What are the best practices to secure file uploads on a web server?

Asked on Dec 08, 2025

Answer

To secure file uploads on a web server, you should validate file types, limit file sizes, and store files securely. These practices help prevent malicious files from compromising your system.

Example Concept: Secure file uploads involve validating the file type by checking the MIME type and file extension, limiting the file size to prevent denial of service attacks, and storing files outside the web root to prevent direct access. Implementing checks such as virus scanning and using Content Security Policy (CSP) headers can further enhance security.

Additional Comment:

Always validate the file type on the server side, not just client side.
Use a whitelist approach for allowed file types to minimize risk.
Consider using a third-party service for virus scanning uploaded files.
Ensure that file permissions are set correctly to prevent unauthorized access.
Regularly review and update security policies related to file uploads.

✅ Answered with Security best practices.

Ask any question about Website Security here... and get an instant response.

What are the best practices to secure file uploads on a web server?

Asked on Dec 08, 2025

Answer

Additional Comment:

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