CVE-2020-15903: Nagios XI

Critical severity, CVSS 9.8. EPSS: 5.5% chance of exploitation in the next 30 days.

An issue was found in Nagios XI before 5.7.3. There is a privilege escalation vulnerability in backend scripts that ran as root where some included files were editable by nagios user. This issue was fixed in version 5.7.3.

Affected products

• Nagios Nagios XI: before 5.7.3 (fixed in 5.7.3)

Published 2020-09-09. Last modified 2026-06-17.