How can you ensure the security of file uploads in a web application?

To ensure the security of file uploads in a web application, it's crucial to perform server-side validation. This includes checking the file's content type, verifying its size, and possibly scanning it for malware. Other important security measures include limiting file sizes to prevent denial-of-service attacks and disallowing specific file types to prevent the upload of potentially harmful files. Using an unauthenticated endpoint is not recommended as it could lead to security vulnerabilities.