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Vulnerability record · CVE-2021-33179 · published 14 October 2021

CVE-2021-33179: Nagios xi cross-site scripting vulnerability

Nagios · Nagios Xi

The general user interface in Nagios XI versions prior to 5.8.4 is vulnerable to authenticated reflected cross-site scripting. An authenticated victim, who accesses a specially crafted malicious URL, would unknowingly execute the attached payload.

6.1 CVSS 3.1 Medium EPSS 12% · top 4.1% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

The general user interface in Nagios XI versions prior to 5.8.4 is vulnerable to authenticated reflected cross-site scripting. An authenticated victim, who accesses a specially crafted malicious URL, would unknowingly execute the attached payload.

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

Affected products

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

References

LinkTags
https://www.synopsys.com/blogs/software-security/cyrc-advisory-nagios-xi Third Party Advisory
https://www.synopsys.com/blogs/software-security/cyrc-advisory-nagios-xi Third Party Advisory

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Related vulnerabilities

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

8.8CVE-2021-25296Nagios XI Windows WMI Config Wizard OS Command InjectionNagios XI 5.7.5 fails to sanitize authenticated user input in the windowswmi config wizard file, allowing OS command injection. Because the affected …KEVEPSS 72%analysed8.8CVE-2021-25297Nagios XI switch config wizard OS command injectionNagios XI 5.7.5 fails to sanitize authenticated user input in the switch configuration wizard file switch.inc.php, allowing OS command injection via …KEVEPSS 57%analysed8.8CVE-2021-25298Nagios XI cloud-vm config wizard OS command injectionNagios XI 5.7.5 fails to properly sanitize authenticated user input in /usr/local/nagiosxi/html/includes/configwizards/cloud-vm/cloud-vm.inc.php, all…KEVEPSS 75%analysed8.8CVE-2019-15949Nagios XI getprofile.sh command injection allows root code executionNagios XI before 5.6.6 runs the getprofile.sh script as root through a passwordless sudo entry when a system profile is downloaded. Because that scri…KEVEPSS 77%analysed9.8CVE-2024-24401Nagios XI monitoringwizard.php SQL injection allows remote code executionNagios XI 2024R1.01 contains a SQL injection flaw in the monitoringwizard.php component. A remote attacker can send a crafted payload that leads to a…EPSS 46%analysed9.8CVE-2024-24402Nagios xi improper privilege management vulnerabilityAn issue in Nagios XI 2024R1.01 allows a remote attacker to escalate privileges via a crafted script to the /usr/local/nagios/bin/npcd component.EPSS 3.4%9.8CVE-2023-48085Nagios XI command_test.php remote code executionNagios XI before 5.11.3 contains a remote code execution flaw in the command_test.php component, classified as code injection (CWE-94). The CVSS 3.1 …EPSS 76%analysed9.8CVE-2023-48084Nagios xi sql injection vulnerabilityNagios XI before version 5.11.3 was discovered to contain a SQL injection vulnerability via the bulk modification tool.EPSS 34%

Source: NIST National Vulnerability Database (record CVE-2021-33179), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.