CVE-2021-25298Nagios XI OS Command Injection

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.

8.8 HIGHEPSS 73.64%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-07-09 13:39 UTC

OverviewCVSS details

8.8HIGHCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Feb 15, 2021
Assigner: mitre

Affected

nagios xi (nagios)

Versions: 5.5.6 through 5.7.5

Exploitation

Public exploit: Yes · 4 references
CISA KEV: Listed · Jan 18, 2022
KEV due date: Feb 1, 2022
Ransomware use: Unknown
SSVC: Exploitation active · Automatable no · Impact total

EPSS · FIRST, scored Nov 7

73.64%chance of exploitation in 30 days

Higher than 99.47% of CVEs

CVSS 3.1 · NVD

8.8High

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

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

CVSS 2.0 · NVD

9.0High

AV:N/AC:L/Au:S/C:C/I:C/A:C

Attack vector: Network
Attack complexity: Low
Authentication: Single
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
8.8	HIGH	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0	HIGH	2.0NVD	AV:N/AC:L/Au:S/C:C/I:C/A:C

CISA required action

⚡ Known exploited · remediation due Feb 1, 2022

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Details

CVE ID: CVE-2021-25298
Status: Analyzed
Assigner (CNA): mitre
Published: Feb 15, 2021
Last modified: 2026-07-09 13:39 UTC
Weaknesses: CWE-78
CWE-138

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 11:31 UTC.