CVE-2020-36866: Nagios XI

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

Nagios XI versions prior to 5.7.3 are vulnerable to cross-site scripting (XSS) via the Manage Users page of the Admin interface. 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 5.7.2 (fixed in 5.7.2)

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