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Vulnerability record · CVE-2021-3273 · published 25 February 2021

CVE-2021-3273: Nagios xi code injection vulnerability

Nagios · Nagios Xi

Nagios XI below 5.7 is affected by code injection in the /nagiosxi/admin/graphtemplates.php component. To exploit this vulnerability, someone must have an admin user account in Nagios XI's web system.

7.2 CVSS 3.1 High EPSS 7.2% · top 5.9% CWE-94 · Code injection
7.2CVSS 3.1 base score, v2 9.0
7.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Nagios XI below 5.7 is affected by code injection in the /nagiosxi/admin/graphtemplates.php component. To exploit this vulnerability, someone must have an admin user account in Nagios XI's web system.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gist.github.com/leommxj/93edce6f8572cefe79a3d7da4389374e ExploitThird Party Advisory
https://www.nagios.com/downloads/nagios-xi/change-log/ Release NotesVendor Advisory
https://gist.github.com/leommxj/93edce6f8572cefe79a3d7da4389374e ExploitThird Party Advisory
https://www.nagios.com/downloads/nagios-xi/change-log/ Release NotesVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-3273), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.