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"XML parsing error"

Automail | Last updated: Jun 02, 2022 08:27AM UTC

Hi, I'm currently having problem on solving the "Blind XXE with out-of-band interaction" challenge. Sending to "Repeater" the POST request for the /product/stock endpoint and just changing the "productId" number with an ampersand (&) the application response is "XML parsing error". I can't get on top of it, cause trying to adjust the structure of the XML payload doesn't help. Thanks in advance for anyone helping me.

Liam, PortSwigger Agent | Last updated: Jun 02, 2022 09:27AM UTC

Have you checked out the community solution videos?

Automail | Last updated: Jun 02, 2022 06:28PM UTC

Hi thanks for the answer. Yes, I did check the community solution and the payload doesn't work.

Automail | Last updated: Jun 03, 2022 07:08AM UTC

Found the problem. I did not know that I'm forced to use Burp Pro and it's Burp collaborator. Using any of the other open source tool don't work.

Liam, PortSwigger Agent | Last updated: Jun 03, 2022 11:19AM UTC