CVE-2025-47890: Fortinet FortiOS

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

An URL Redirection to Untrusted Site vulnerabilities [CWE-601] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiProxy 7.6.0 through 7.6.3, FortiProxy 7.4 all versions, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions, FortiSASE 25.2.a may allow an unauthenticated attacker to perform an open redirect attack via crafted HTTP requests.

Affected products

• Fortinet FortiOS: from 6.4.0, before 7.4.9 (fixed in 7.4.9); from 7.6.0, before 7.6.4 (fixed in 7.6.4)
• Fortinet FortiProxy: from 7.0.0, before 7.6.4 (fixed in 7.6.4)
• Fortinet Fortisase: version 25.3.40 only

Published 2025-10-14. Last modified 2026-07-08.