CVE-2021-25298 on CISA KEV

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 l

01What CISA says about this vulnerability

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.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

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

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
n	a / n/a	n/a

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

Open in Sigma generator →