CVE-2021-47690 MEDIUM

CVE-2021-47690: Nagios XI < 5.8.2 Core Config Manager (CCM) XSS via Overlay Modals

Vendor Nagios

Product XI

Weakness CWE-79 · XSS

Published October 30, 2025

Last update November 17, 2025

View on NVD All CVEs

CVSS base score

5.1/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction —

Confidentiality —

Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

What the vulnerability does

01Description

The Core Config Manager (CCM) in Nagios XI versions prior to CCM 3.1.1 / Nagios XI 5.8.2 contains multiple cross-site scripting (XSS) vulnerabilities in Overlay modals. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

Key dates

02Disclosure timeline

October 30, 2025 CVE published

November 17, 2025 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2021-47690

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04Related CVE

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