CVE-2018-19411: Paessler PRTG Network Monitor

High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days.

PRTG Network Monitor before 18.2.40.1683 allows an authenticated user with a read-only account to create another user with a read-write account (including administrator) via an HTTP request because /api/addusers doesn't check, or doesn't properly check, user rights.

Affected products

• Paessler PRTG Network Monitor: before 18.2.40.1683 (fixed in 18.2.40.1683)

Published 2018-11-21. Last modified 2026-06-17.