What’s Vulnerable › Vulnerabilities

CVE-2021-25296: Nagios XI OS Command Injection

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-01-18
• EPSS: 71.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-15 · updated 2026-07-09

Description

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.

Affected products

• Nagios XI: from 5.5.6 through 5.7.5

References

• 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
• 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
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25296

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