CVE-2020-10821: Nagios XI

Medium severity, CVSS 4.8. EPSS: 71.1% chance of exploitation in the next 30 days.

Nagios XI 5.6.11 allows XSS via the account/main.php theme parameter.

Affected products

• Nagios Nagios XI: version 5.6.11 only

Published 2020-03-22. Last modified 2026-06-17.