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How can I use Burp to intercept requests from a Flask application on localhost?

Ockham | Last updated: Sep 29, 2023 01:58AM UTC

I'm developing a Flask application in my macbook. After starting the Flask server I'm able to see the request in Burp but never the response. I'm using Burp's Chromium browser and Burp Pro 2023.10.1.1.

Dominyque, PortSwigger Agent | Last updated: Sep 29, 2023 09:52AM UTC

Hi Ockham Do you see the same behavior if using a different browser?

Ockham | Last updated: Sep 30, 2023 10:42AM UTC

Yes, I get the same behavior using Firefox, Chrome, or Brave.

Dominyque, PortSwigger Agent | Last updated: Oct 02, 2023 09:03AM UTC

Hi Does it work when you are not using Burp? Does the application function normally when being proxied through Burp?

Ockham | Last updated: Oct 06, 2023 10:05PM UTC

The application works fine but if it is proxied through Burp it doesn’t work.

Dominyque, PortSwigger Agent | Last updated: Oct 09, 2023 07:37AM UTC