ZDI-25-1094: Fortinet FortiWeb ApacheCookie_parse Improper Verification of Cryptographic Signature Authentication Bypass Vulnerability
Published Dec 16, 2025
·Updated
This vulnerability allows remote attackers to bypass authentication on affected installations of Fortinet FortiWeb. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.1. The following CVEs are assigned: CVE-2025-64447.
Affected Software
1 affected component
Fortinet FortiWeb
Event History
Dec 16, 2025
Advisory Published
via ZDI·06:00 AM
Data Sourced
via ZDI·06:00 AM
Description
Frequently Asked Questions
1
What is the severity of ZDI-25-1094?
The severity of ZDI-25-1094 is rated as 8.1 on the CVSS scale.
2
How do I fix ZDI-25-1094?
To fix ZDI-25-1094, apply the latest security patches provided by Fortinet for FortiWeb.
3
What type of attack does ZDI-25-1094 enable?
ZDI-25-1094 enables remote attackers to bypass authentication on affected installations of FortiWeb.
4
Is authentication required to exploit ZDI-25-1094?
No, authentication is not required to exploit ZDI-25-1094.
5
Which product is affected by ZDI-25-1094?
The affected product by ZDI-25-1094 is Fortinet FortiWeb.