Web Application Firewall

Umbraco CMS 8.5.3 allows an authenticated file upload

Overview :

Umbraco CMS 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Package functionality.

Umbraco CMS 8.5.3 – Authenticated FileUpload PoC

Attack Type: File Upload

Product Version: 8.5.3

OWASP Category: Unrestricted File Upload

Solution: Add package integrity mechanisms and/or file extension whitelist/blacklist filtering

Summary: Umbraco CMS 8.5.3 allows an authenticated file upload via the Packages functionality

Technical Description: See CVE-2020-9472.pdf

Exploit: See exploit_local.py

Vulnerability Details :

CVE ID :

CVE-2020-9472

Reference Order

References are typically listed in the order below:

Initial announcement
Response team advisory
Vendor acknowledgement/advisory
All other public sources

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