PRTG Network Monitor - Authentication Bypass (CVE-2018-19410)
Description
PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated attackers to create users with read-write privileges (including administrator). A remote unauthenticated user can craft an HTTP request and override attributes of the 'include' directive in /public/login.htm and perform a Local File Inclusion attack, by including /api/addusers and executing it. By providing the 'id' and 'users' parameters, an unauthenticated attacker can create a user with read-write privileges (including administrator).
psychologyCrowdSec Analysis
CVE-2018-19410 is a high-severity vulnerability in PRTG Network Monitor that allows remote unauthenticated attackers to escalate privileges by leveraging file inclusion through crafted requests.
CrowdSec has been tracking this vulnerability and its exploits since 28th of May 2025.
CrowdSec network observations suggest that most exploitation of CVE-2018-19410 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2018-19410 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2018-19410 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.
Exploitation attempts can be identified by HTTP requests directed at URLs containing /public/login.htm with patterns that manipulate user creation functionality.
Full Intelligence Available
Connect your API key to access CrowdSec scores, exploit timelines, and attacker IPs.
| Event | Date |
|---|---|
| CVE Published | 2018-11-21 |
| CISA KEV | 2025-02-04 |
| CISA Remediation Deadline | 2025-02-25 |
| Rule Released | 2025-05-28 |
| CrowdSec First Seen | 2025-05-28 |