CVE-2021-25298

Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the...

8.8 HighIn KEVPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

73.6%Up 72.6 points since Apr 14, 2021

What each source reports

NVD Score used 8.8

Record: CVE-2021-25298
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 9.0 HighAV:N/AC:L/Au:S/C:C/I:C/A:C
Weakness: CWE-78
Updated: 2026-11-02

CVE List 8.8

Record: CVE-2021-25298
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-78
Updated: 2026-11-02

EUVDEUVD-2021-12198 8.8

Record: EUVD-2021-12198
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-6gq5-wx57-577c 8.8

Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the...

Record: GHSA-6gq5-wx57-577c
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-78
Updated: 2026-11-02

CISA KEV No score

Nagios XI OS Command Injection

Nagios XI contains a vulnerability which can lead to OS command injection on the Nagios XI server.

Record: CVE-2021-25298
Weakness: CWE-78, CWE-138
Updated: 2026-11-02

Affected products

nagios xi

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Metasploit	Nagios XI 5.5.6 to 5.7.5 - ConfigWizards Authenticated Remote Code Exection	2021-02-13
Nuclei	Nagios XI 5.5.6-5.7.5 - Authenticated Remote Command Injection

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-25298 is a high vulnerability (CVSS 8.8) in Nagios Xi, published February 15, 2021. CISA lists it as known to be exploited, since January 18, 2022. EUVD reports exploitation since January 18, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 73.6%, the 99th percentile. No source names a fixed version.