CVE-2025-59719
CVSS v3
9.8
CRITICAL
EPSS Score
29.2 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2025-12-09
Frequently asked questions
What is 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.
Is CVE-2025-59719 actively exploited?
Active exploitation of CVE-2025-59719 has not been confirmed. Its EPSS score was 29.2% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2025-59719?
CVE-2025-59719 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2025-59719 affecting your environment?
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