CVE-2021-47694: Nagios XI

Medium severity, CVSS 6.1. EPSS: 0.5% chance of exploitation in the next 30 days.

The Core Config Manager (CCM) in Nagios XI versions prior to CCM 3.1.4 / Nagios XI 5.8.6 contains a reflected cross-site scripting (XSS) vulnerability via the Test Command functionality. 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.

Affected products

• Nagios Nagios XI: before 5.8.6 (fixed in 5.8.6)

Published 2025-10-30. Last modified 2026-06-17.