Advisory Details

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Paessler PRTG Network Monitor. Some user interaction on the part of an administrator is required to exploit this vulnerability.

The specific flaw exists within the PRTG Network Monitor web interface. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to bypass authentication on the system.

03/13/24 – ZDI reported the vulnerability to the vendor
11/19/24 - ZDI asked for updates
12/16/24 - ZDI notified the vendor of the intention to publish the case as 0-day advisory

Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the application

• 2024-03-13 - Vulnerability reported to vendor
• 2024-12-30 - Coordinated public release of advisory
• 2024-12-30 - Advisory Updated