High · published October 31, 2025
🚨 An authenticated user can transform a simple command into a full-blown takeover in Nagios XI! 💥 Think of it like a restaurant where a trusted server can sneak in a secret ingredient that alters every dish on the menu — if no one’s checking the kitchen, chaos ensues! This vulnerability lets an attacker execute arbitrary commands with the same privileges as the Nagios XI user. That means they could modify system configurations or, worse yet, fully compromise the host, leading to an extensive data breach and loss of control.
Think of it like a restaurant where a trusted server can sneak in a secret ingredient that alters every dish on the menu — if no one’s checking the kitchen, chaos ensues! CVE-2020-36856 arises from insufficient validation of the 'address' parameter within the command_test.php script. An authenticated user can inject shell metacharacters, leading to remote command execution on the server.
This vulnerability lets an attacker execute arbitrary commands with the same privileges as the Nagios XI user. That means they could modify system configurations or, worse yet, fully compromise the host, leading to an extensive data breach and loss of control. To protect your system, upgrade Nagios XI to version 5.6.14 or later immediately. Also, review user access and permissions to ensure only trusted individuals can access the Core Config Manager. Regularly audit your configurations and command parameters to prevent future exploits. You've got this! With these steps, you’ll transform into a security hero in no time! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| nagios/nagios_xi | < 5.6.14 | 5.6.14 |