CVE-2020-27990

Name: CVE-2020-27990
Creator: NVD / NIST
Published: 2020-11-16T17:15:13.033+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 21.75%

Last modified Jun 17, 2026

CVE-2020-27990 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Nagios XI before 5.7.5 is vulnerable to XSS in the Deployment tool (add agent).. EPSS estimates a 21.75% chance of exploitation in the next 30 days.

Description

Nagios XI before 5.7.5 is vulnerable to XSS in the Deployment tool (add agent).

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

21.75%

97.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Nagios	Nagios Xi	< 5.7.5

References

https://www.nagios.com/downloads/nagios-xi/change-log/Release Notes, Vendor Advisory
https://www.nagios.com/downloads/nagios-xi/change-log/Release Notes, Vendor Advisory

Timeline

Published: Nov 16, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27990?

Nagios XI before 5.7.5 is vulnerable to XSS in the Deployment tool (add agent).

How severe is CVE-2020-27990?

CVE-2020-27990 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 21.75% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27990?

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-2020-27990?

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

Scan your code now

Source: NVD / NIST