CVE-2019-25377: Opnsense

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

OPNsense 19.1 contains a reflected cross-site scripting vulnerability in the system_advanced_sysctl.php endpoint that allows attackers to inject malicious scripts via the value parameter. Attackers can craft POST requests with script payloads in the value parameter to execute JavaScript in the context of authenticated user sessions.

Affected products

• Opnsense Opnsense: version 19.1 only

Published 2026-02-15. Last modified 2026-06-17.