CVE-2020-28901

Name: CVE-2020-28901
Creator: NVD / NIST
Published: 2021-05-24T13:15:07.65+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 9.11%

Last modified Jun 17, 2026

CVE-2020-28901 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Command Injection in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation or Code Execution as root via vectors related to corrupt component installation in cmd_subsys.php.. EPSS estimates a 9.11% chance of exploitation in the next 30 days.

Description

Command Injection in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation or Code Execution as root via vectors related to corrupt component installation in cmd_subsys.php.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

9.11%

94.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-77

Affected Software

Vendor	Product	Versions
Nagios	Fusion	<= 4.1.8

References

http://packetstormsecurity.com/files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.htmlThird Party Advisory, VDB Entry
https://skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you/Exploit, Third Party Advisory
https://www.nagios.com/downloads/nagios-xi/change-log/Release Notes, Vendor Advisory
http://packetstormsecurity.com/files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.htmlThird Party Advisory, VDB Entry
https://skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you/Exploit, Third Party Advisory
https://www.nagios.com/downloads/nagios-xi/change-log/Release Notes, Vendor Advisory

Timeline

Published: May 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28901?

Command Injection in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation or Code Execution as root via vectors related to corrupt component installation in cmd_subsys.php.

How severe is CVE-2020-28901?

CVE-2020-28901 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 9.11% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28901?

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-2020-28901?

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

Scan your code now

Source: NVD / NIST