Vulnerability in Fortinet Fortiweb

CVE-2025-59719

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.292 (98.1th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-59719: held from 0.295 to 0.292.

EPSS over last 30 days · oldest: 0.295 · newest: 0.292 · change: -0.003

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-59719?
CVE-2025-59719 is a critical-severity vulnerability in Fortinet Fortiweb, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2025-12-09.
How severe is CVE-2025-59719?
Critical severity. CVSS v3 base score is 9.8 out of 10.