CVE-2021-37223: Nagios XI

Medium severity, CVSS 6.5. EPSS: 5% chance of exploitation in the next 30 days.

Nagios Enterprises NagiosXI <= 5.8.4 contains a Server-Side Request Forgery (SSRF) vulnerability in schedulereport.php. Any authenticated user can create scheduled reports containing PDF screenshots of any view in the NagiosXI application. Due to lack of input sanitisation, the target page can be replaced with an SSRF payload to access internal resources or disclose local system files.

Affected products

• Nagios Nagios XI: up to and including 5.8.4

Published 2021-10-05. Last modified 2026-07-09.