CVE-2025-59719: Fortinet FortiWeb

Critical severity, CVSS 9.8. EPSS: 29.2% chance of exploitation in the next 30 days.

An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through 7.6.4, FortiWeb 7.4.0 through 7.4.9 may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message.

Affected products

• Fortinet FortiWeb: from 7.4.0, up to and including 7.4.9; from 7.6.0, up to and including 7.6.4; version 8.0.0 only

Published 2025-12-09. Last modified 2026-06-17.