CVE-2021-25297

Name: CVE-2021-25297
Creator: NVD / NIST
Published: 2021-02-15T13:15:12.793+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10Actively ExploitedEPSS 40.62%

Last modified Jun 17, 2026

CVE-2021-25297 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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/switch/switch.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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 40.62% chance of exploitation in the next 30 days.

Description

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/switch/switch.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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

40.62%

98.5th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Feb 1, 2022.

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Nagios	Nagios Xi	>= 5.5.6, <= 5.7.5

References

http://nagios.comProduct
http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://assets.nagios.com/downloads/nagiosxi/versions.phpExploit, Product
https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.mdExploit, Third Party Advisory
https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-andExploit, Third Party Advisory
http://nagios.comProduct
http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://assets.nagios.com/downloads/nagiosxi/versions.phpExploit, Product
https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.mdExploit, Third Party Advisory
https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-andExploit, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25297US Government Resource

Timeline

Published: Feb 15, 2021
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-25297?

How severe is CVE-2021-25297?

CVE-2021-25297 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 40.62% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2021-25297?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-25297?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST