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CVE-2021-25298

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/cloud-vm/cloud-vm.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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 18 Jan 2022.

Severity
High 8.8
Published
15 Feb 2021
Last changed
9 Jul 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Nagios XIServers and applications · cpe:a:nagios:nagios_xi
  • From 5.5.6 up to 5.7.5

Known exploited

CISA name
Nagios XI OS Command Injection
Required action
Apply updates per vendor instructions.
Due for US agencies
1 Feb 2022
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-25298
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-25298