# CVE-2018-19410: PRTG Network Monitor - Authentication Bypass

> Live exploitation tracking for CVE-2018-19410 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2018-19410

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** Paessler PRTG
- **Weaknesses:** CWE-288 (Authentication Bypass Using an Alternate Path or Channel)
- **Tags:** enterprise_software

## 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).

## CrowdSec analysis

[CVE-2018-19410](https://euvd.enisa.europa.eu/vulnerability/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.

## Timeline

- 2018-11-21: CVE Published. CVE-2018-19410 is published to NVD.
- 2025-02-04: CISA KEV. CVE-2018-19410 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2025-02-25: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).
- 2025-05-28: Rule Released. CrowdSec releases a rule to detect CVE-2018-19410 exploitation attempts against the CrowdSec Network.
- 2025-05-28: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2018-19410 for the first time.

## References

- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2018/CVE-2018-19410.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2018-19410) follows observed exploitation activity for CVE-2018-19410. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.