CVE-2021-47689

Nagios XI < 5.8.0 Core Config Manager (CCM) XSS via Templates Pages

CVSS 5.1 MEDIUMEPSS 0.4%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.1EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

30 Oct 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

The Core Config Manager (CCM) in Nagios XI versions prior to CCM 3.1.0 / Nagios XI 5.8.0 contais a cross-site scripting (XSS) vulnerability in the Templates pages, specifically in the UI logic that renders and handles the Active/Actions buttons. 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.

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

Affected products

Nagios · XI

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References

https://www.nagios.com/changelog/nagios-xi/https://www.vulncheck.com/advisories/nagios-xi-ccm-xss-via-templates-pages