CVE-2025-59719: Improper access control in Fortinet FortiWeb
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.
AI Analysis
Technical Summary
This vulnerability in Fortinet FortiWeb products arises from improper verification of cryptographic signatures in the SAML authentication process. Specifically, an attacker can craft a malicious SAML response message that bypasses FortiCloud Single Sign-On (SSO) authentication without requiring any prior authentication. The affected versions include FortiWeb 8.0.0, 7.6.0 through 7.6.4, and 7.4.0 through 7.4.9. The vulnerability is rated critical with a CVSS 3.1 score of 9.1, reflecting network attack vector, no privileges required, no user interaction, and full impact on confidentiality, integrity, and availability. The vendor has released an official fix to address this issue.
Potential Impact
Successful exploitation allows an unauthenticated attacker to bypass FortiCloud SSO login authentication, potentially gaining unauthorized access to protected resources. This compromises confidentiality, integrity, and availability of the affected FortiWeb systems.
Mitigation Recommendations
An official fix is available from Fortinet to remediate this vulnerability. Users should apply the vendor-provided patches or updates for FortiWeb versions 8.0.0, 7.6.0 through 7.6.4, and 7.4.0 through 7.4.9 as soon as possible to prevent exploitation.
CVE-2025-59719: Improper access control in Fortinet FortiWeb
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 v3.1
Score 9.1critical
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Fortinet FortiWeb products arises from improper verification of cryptographic signatures in the SAML authentication process. Specifically, an attacker can craft a malicious SAML response message that bypasses FortiCloud Single Sign-On (SSO) authentication without requiring any prior authentication. The affected versions include FortiWeb 8.0.0, 7.6.0 through 7.6.4, and 7.4.0 through 7.4.9. The vulnerability is rated critical with a CVSS 3.1 score of 9.1, reflecting network attack vector, no privileges required, no user interaction, and full impact on confidentiality, integrity, and availability. The vendor has released an official fix to address this issue.
Potential Impact
Successful exploitation allows an unauthenticated attacker to bypass FortiCloud SSO login authentication, potentially gaining unauthorized access to protected resources. This compromises confidentiality, integrity, and availability of the affected FortiWeb systems.
Mitigation Recommendations
An official fix is available from Fortinet to remediate this vulnerability. Users should apply the vendor-provided patches or updates for FortiWeb versions 8.0.0, 7.6.0 through 7.6.4, and 7.4.0 through 7.4.9 as soon as possible to prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- fortinet
- Date Reserved
- 2025-09-19T04:30:39.464Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
Threat ID: 69385e4c74ebaa3baba1401b
Added to database: 12/09/2025, 17:37:16 UTC
Last enriched: 08/11/2026, 13:13:48 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 368
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