CVE-2018-13380: Fortinet FortiOS

Medium severity, CVSS 6.1. EPSS: 62.5% 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, 5.4.0 to 5.4.12, 5.2 and below and Fortinet FortiProxy 2.0.0, 1.2.8 and below under SSL VPN web portal allows attacker to execute unauthorized malicious script code via the error or message handling parameters.

Affected products

• Fortinet FortiOS: up to and including 5.2; from 5.4.0, up to and including 5.4.12; from 5.6.0, up to and including 5.6.7; from 6.0.0, up to and including 6.0.4
• Fortinet FortiProxy: up to and including 1.2.8; version 2.0.0 only

Published 2019-06-04. Last modified 2026-06-17.