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Lab: Stored XSS into HTML context with nothing encoded


This lab contains a stored cross-site scripting vulnerability in the comment functionality.

To solve this lab, submit a comment that calls the alert function when the blog post is viewed.


  1. Enter the following into the comment box:

  2. Enter a name, email and website.
  3. Click "Post comment".
  4. Go back to the blog.

Community solutions

Michael Sommer