Paessler PRTG Network Monitor Local File Inclusion Vulnerability
n/a — n/a
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).
9.8
86.5%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- Nov 21, 2018
- Modified
- Oct 21, 2025
- Added to KEV
- Feb 4, 2025
- Federal patch due
- Feb 25, 2025
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2018-19410, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2018-19410 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2018-19410?
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).
How severe is CVE-2018-19410?
CVE-2018-19410 has a CVSS base score of 9.8 out of 10 (CVSS 3.1).
Is CVE-2018-19410 actively exploited in the wild?
Yes. CVE-2018-19410 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Feb 4, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2018-19410?
86.5% - meaning FIRST.org's EPSS model estimates a 86.5% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2018-19410?
Yes - a public Nuclei template referencing CVE-2018-19410 exist in public repositories we checked.
Cross-checked against
Impactr finds and proves whether CVE-2018-19410 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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