CVE-2020-28907: Nagios Fusion

Critical severity, CVSS 9.8. EPSS: 4.5% chance of exploitation in the next 30 days.

Incorrect SSL certificate validation in Nagios Fusion 4.1.8 and earlier allows for Escalation of Privileges or Code Execution as root via vectors related to download of an untrusted update package in upgrade_to_latest.sh.

Affected products

• Nagios Fusion: up to and including 4.1.8

Published 2021-05-24. Last modified 2026-06-17.