CVE-2023-38999: Opnsense

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A Cross-Site Request Forgery (CSRF) in the System Halt API (/system/halt) of OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows attackers to cause a Denial of Service (DoS) via a crafted GET request.

Affected products

• Opnsense Opnsense: before 23.7 (fixed in 23.7)

Published 2023-08-09. Last modified 2026-06-17.