Lab: Exploiting XXE using external entities to retrieve files
This lab has a "Check stock" feature that parses XML input and returns any unexpected values in the response.
To solve the lab, inject an XML external entity to retrieve the contents of the
- Visit a product page, click "Check stock", and intercept the resulting POST request in Burp Suite.
Insert the following external entity definition in between the XML declaration and the
<!DOCTYPE test [ <!ENTITY xxe SYSTEM "file:///etc/passwd"> ]>
productIdnumber with a reference to the external entity:
&xxe;. The response should contain "Invalid product ID:" followed by the contents of the