Office Open XML Editor
Summary: PortSwigger's BApp Store lists a Burp Suite extension called Office Open XML Editor, authored by Maxence Schmitt, that adds an editor tab for docx, xlsx, and pptx files uploaded in multipart requests so the XML inside the document can be edited directly in the request. The extension, version 1.0 and last updated 05 January 2018, is aimed at testing applications that parse Office files for XML External Entity (XXE) vulnerabilities, and PortSwigger states it makes no warranty about third-party extensions' quality or usefulness.
Key Takeaway: Any application that accepts an uploaded Office file and parses its XML is a candidate for XXE, and this extension exists specifically to make that test easy - a reminder that document upload endpoints are an attack surface worth checking.
Read the original at PortSwigger Research ↗
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