CVE-2017-3133: Fortinet FortiOS

Medium severity, CVSS 6.1. EPSS: 10.7% chance of exploitation in the next 30 days.

A Cross-Site Scripting vulnerability in Fortinet FortiOS versions 5.6.0 and earlier allows attackers to execute unauthorized code or commands via the Replacement Message HTML for SSL-VPN.

Affected products

• Fortinet FortiOS: up to and including 5.6.0

Published 2017-09-12. Last modified 2026-06-17.