Missing X-Content-Type-Options Header

The X-Content-Type-Options header is not set. This header prevents browsers from guessing the content type of files.

Why This Matters

Without this header, browsers might interpret files in unintended ways. For example, a text file could be executed as JavaScript, allowing attackers to run malicious code if they can upload files to your server.

How to Fix

Framework-specific solutions and general best practices

Add the header 'X-Content-Type-Options: nosniff' to all responses. This tells browsers to strictly follow the Content-Type you specify.

Quick Reference

Severity

Medium Risk

missing_x_content_type_options

AI Assistant Prompt

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Please fix the "Missing X-Content-Type-Options Header" security vulnerability in this web application.

The issue is: The X-Content-Type-Options header is not set. This header prevents browsers from guessing the content type of files.

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