✅ Secure Cross-Site Scripting (XSS) Prevention

In this secure version, user comments are properly sanitized and rendered as plain text rather than HTML. This prevents any malicious HTML or JavaScript from being executed.

Key Protections:

🔍 How to Verify Secure Implementation

  1. Go to the Secure Comment Form: /secure/comment-form  and try submitting a script like <script>alert('XSS!')</script>
  2. It will be shown as plain text — no alert will trigger.
  3. View the admin panel: /secure/admin  to confirm safe rendering of all comments.
  4. Compare with vulnerable version: /vulnerable/comment-form  — the same payload will trigger an alert popup.
  5. Reset with "Delete All Comments": to test again from a clean slate.
  6. Inspect API Response: All comments are returned as plain, encoded text with no HTML tags.

✅ This secure setup ensures that all user input is treated as text, neutralizing XSS attacks completely.