CVE-2017-14186: Fortinet FortiOS

Medium severity, CVSS 5.4. EPSS: 3.7% chance of exploitation in the next 30 days.

A Cross-site Scripting (XSS) vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.7, 5.4 and below versions under SSL VPN web portal allows a remote user to inject arbitrary web script or HTML in the context of the victim's browser via the login redir parameter. An URL Redirection attack may also be feasible by injecting an external URL via the affected parameter.

Affected products

• Fortinet FortiOS: up to and including 5.0; after 5.2.0, up to and including 5.2.12; from 5.4.0, up to and including 5.4.6; from 5.6.0, up to and including 5.6.2

Published 2017-11-29. Last modified 2026-06-17.