CVE-2018-13382: Fortinet FortiOS and FortiProxy Improper Authorization

High severity, CVSS 7.5. Actively exploited: in CISA KEV since 2022-01-10. EPSS: 81.7% chance of exploitation in the next 30 days.

An Improper Authorization vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.8 and 5.4.1 to 5.4.10 and FortiProxy 2.0.0, 1.2.0 to 1.2.8, 1.1.0 to 1.1.6, 1.0.0 to 1.0.7 under SSL VPN web portal allows an unauthenticated attacker to modify the password of an SSL VPN web portal user via specially crafted HTTP requests

Affected products

• Fortinet FortiOS: from 5.4.1, before 5.4.11 (fixed in 5.4.11); from 5.6.0, before 5.6.9 (fixed in 5.6.9); from 6.0.0, before 6.0.5 (fixed in 6.0.5)
• Fortinet FortiProxy: before 1.2.9 (fixed in 1.2.9); version 2.0.0 only

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