#VU49321 XML External Entity injection in Plone - CVE-2020-28734
Published: December 30, 2020 / Updated: January 7, 2021
Vulnerability identifier: #VU49321
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-28734
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Plone
Plone
Software vendor:
Plone
Plone
Description
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied XML input. A remote authenticated attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.
Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.
Remediation
Install updates from vendor's website.