CVE-2018-19410
Paessler PRTG Network Monitor Local File Inclusion Vulnerability
Paessler PRTG Network Monitor
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).
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 4 February 2025. US federal agencies were required to remediate it by 25 February 2025.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 97.9%, which is higher than 99.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2018-19410 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2018-19410.
What does CVE-2018-19410 affect?
CVE-2018-19410 affects Paessler PRTG Network Monitor. 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 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 97.9%, higher than 99.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 25 February 2025.
How should organisations respond to CVE-2018-19410?
Apply the vendor patch for Paessler PRTG Network Monitor as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.