CVE-2021-25296

CVE-2021-25296 is a high-severity (CVSS 8.8) vulnerability in Nagios Nagios XI. CISA added it to the Known Exploited Vulnerabilities catalog on January 18, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by February 1, 2022. CISA does not currently list it as used in ransomware campaigns. Nagios has 4 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/windowswmi/windowswmi.inc.php due to improper sanitization of authenticated user-controlled input by a single HTTP request, which can lead to OS command injection on the Nagios XI server.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

• http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html
• http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html
• https://assets.nagios.com/downloads/nagiosxi/versions.php
• https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md
• https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and
• http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html
• http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html
• https://assets.nagios.com/downloads/nagiosxi/versions.php