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CVE-2025-59719

Fortinet FortiWeb vulnerability

9.8 CRITICALEPSS 29.2%
  1. Published9 Dec 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Fortinet FortiWeb≥ 7.4.0 ≤ 7.4.9 · ≥ 7.6.0 ≤ 7.6.4 · 8.0.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2025-59719 being actively exploited?

CVE-2025-59719 is not in the CISA KEV catalog. Its EPSS exploit probability is 29.2%.

How severe is CVE-2025-59719?

CVE-2025-59719 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 29.2% probability of exploitation.

Which products are affected by CVE-2025-59719?

Affected products include Fortinet FortiWeb.

How do I fix CVE-2025-59719?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-59719 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.