The vulnerability of the Nagios XI monitoring tool lies in the lack of protection for the website structure when processing input fields $ARG1$ and $ARG2$. This allows attackers to execute arbitrary commands.

The vulnerability of the Nagios XI monitoring tool is related to the lack of measures taken to protect the structure of the web page during the processing of input fields $ARG1$ and $ARG2$. Exploiting this vulnerability allows a malicious actor to execute arbitrary commands remotely...