PT-2018-24: Local File Inclusion in PRTG Network Monitor

Vulnerable software

PRTG Network Monitor
Version: 18.2.40 and earlier


Severity level

Severity level: High
Impact: Local File Inclusion, Lack of Authentication
Access Vector: Remote

CVSS v3:
Base Score: 9.8
Vector: (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVE: no assigned

Vulnerability description

The specialists of the Positive Research center have detected a Local File Inclusion vulnerability in PRTG Network Monitor.

Vulnerability allows remote unauthenticated attackers to create users with read-write privileges including administrators by overriding attributes of the 'include' directive in /public/login.htm, and then including and executing a "/api/addusers" file. By providing 'id' and 'users' parameters, an attacker can create users with read-write privileges including administrators.

How to fix

Update your software up to the latest version

Advisory status

25.05.2018 - Vendor gets vulnerability details
07.05.2018 - Vendor releases fixed version and details
26.10.2018 - Public disclosure


The vulnerability was detected by Dmitry Galecha, Positive Research Center (Positive Technologies Company)


Reports on the vulnerabilities previously discovered by Positive Research:

About Positive Technologies

Positive Technologies is a leading provider of vulnerability assessment, compliance management and threat analysis solutions to more than 1,000 global enterprise clients. Our solutions work seamlessly across your entire business: securing applications in development; assessing your network and application vulnerabilities; assuring compliance with regulatory requirements; and blocking real-time attacks. Our commitment to clients and research has earned Positive Technologies a reputation as one of the foremost authorities on SCADA, Banking, Telecom, Web Application and ERP security, and distinction as the #1 fastest growing Security and Vulnerability Management firm in 2012, as shown in an IDC report*. To learn more about Positive Technologies please visit

*Source: IDC Worldwide Security and Vulnerability Management 2013-2017 Forecast and 2012 Vendor Shares, doc #242465, August 2013. Based on year-over-year revenue growth in 2012 for vendors with revenues of $20M+