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Burp Collaborator - customHttpContent does not work with images

Christian | Last updated: Apr 12, 2022 05:25AM UTC

Hi, I tried to add a customHttpContent image to our private burp collaborator server, but it looks like the output is garbled and not rendered correctly. It looks like the decoded string has some weird encoding issues as text renders normally (for example the PNG in the PNG Header) but everything binary is displayed with the UTF-8 square. Example: cat image.png | base64 -w 0 > image.txt "customHttpContent":[ { "path":"/imgs/image.png", "contentType":"img/png", "base64Content":"BASE64 from above" },

Hannah, PortSwigger Agent | Last updated: Apr 12, 2022 09:51AM UTC