CVE-2025-59719

Name: CVE-2025-59719
Creator: NVD / NIST
Published: 2025-12-09T18:15:55.15+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 23.67%

Last modified Jun 17, 2026

CVE-2025-59719 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 23.67% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

23.67%

97.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
Fortinet	Fortiweb	>= 7.4.0, <= 7.4.9
Fortinet	Fortiweb	>= 7.6.0, <= 7.6.4
Fortinet	Fortiweb	8.0.0

References

Timeline

Published: Dec 9, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-59719?

How severe is CVE-2025-59719?

CVE-2025-59719 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 23.67% probability of exploitation in the next 30 days.

How do I fix CVE-2025-59719?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-59719?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST