CVE-2021-38156: Nagios XI

Medium severity, CVSS 5.4. EPSS: 92.9% chance of exploitation in the next 30 days.

In Nagios XI before 5.8.6, XSS exists in the dashboard page (/dashboards/#) when administrative users attempt to edit a dashboard.

Affected products

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

Published 2021-09-15. Last modified 2026-06-17.