Overview
The vulnerability identified as CVE-2025-64446 affects Fortinet’s FortiWeb version 8.0.1, allowing unauthorized users to bypass authentication mechanisms. This critical flaw enables attackers to gain access to sensitive areas of the web application firewall (WAF) without proper credentials, potentially leading to severe security breaches.
Technical Details
This authentication bypass vulnerability arises from improper validation of session tokens during user authentication processes. Specifically, the flaw allows an attacker to manipulate the session management logic to obtain access without valid credentials. By exploiting this weakness, an attacker can craft specific requests that the FortiWeb appliance erroneously validates as legitimate, thus granting access to restricted functionalities and sensitive data.
For instance, an attacker could utilize tools like Burp Suite or Postman to intercept and modify requests, allowing them to gain unauthorized access to the administrative interface. This could lead to the execution of arbitrary commands or the modification of security settings, severely compromising the integrity of the web application.
Impact
The consequences of exploiting CVE-2025-64446 can be dire. An attacker gaining unauthorized access to the FortiWeb management interface can manipulate security policies, disable protections, or exfiltrate sensitive data. This breach not only jeopardizes the security posture of the affected organization but also exposes it to further attacks, data loss, and compliance violations.
Mitigation
To protect against this vulnerability, organizations should immediately update their FortiWeb appliances to the latest version, ensuring they are not running the vulnerable 8.0.1 version. Regular patch management is crucial in maintaining a secure environment. Additionally, implementing multi-factor authentication (MFA) can add an extra layer of security, making it more difficult for attackers to gain unauthorized access even if they bypass initial authentication measures.
Security professionals should also conduct regular vulnerability assessments and penetration testing to identify and remediate weaknesses in their systems. Monitoring logs for unusual access patterns can help detect potential exploitation attempts early, allowing for swift incident response and mitigation.
Proof of Concept (PoC)
# Titles:Fortinet FortiWeb v8.0.1 - Auth Bypass
# Author: nu11secur1ty
# Date: 11/15/2025
# Vendor: https://www.fortinet.com/
# Software: v8.0.1
# Reference: https://nvd.nist.gov/vuln/detail/CVE-2025-64446
## Description:
CVE-2025-64446 is a critical path traversal vulnerability affecting
multiple versions of Fortinet FortiWeb, a Web Application Firewall (WAF)
used to protect web applications and APIs.
The vulnerability allows an unauthenticated remote attacker to send
specially crafted HTTP/HTTPS requests that may result in administrative
access bypass on vulnerable FortiWeb systems.
## Severity
- CVSS v3.1 Score: 9.8 (Critical)
- Attack Vector: Network
- Privileges Required: None (Unauthenticated)
- User Interaction: None
- Impact: High (Authentication bypass, configuration exposure, potential
full administrative access)
## Affected Products & Versions
The following FortiWeb versions are confirmed vulnerable:
| Product | Affected Versions |
|--------|--------------------|
| FortiWeb 8.0.x | 8.0.0 – 8.0.1 |
| FortiWeb 7.6.x | 7.6.0 – 7.6.4 |
| FortiWeb 7.4.x | 7.4.0 – 7.4.9 |
| FortiWeb 7.2.x | 7.2.0 – 7.2.11 |
| FortiWeb 7.0.x | 7.0.0 – 7.0.11 |
## Fixed Versions
Fortinet has released patched versions that fully address CVE-2025-64446:
| Product | Fixed Version |
|---------|----------------|
| FortiWeb 8.0.x | 8.0.2 or later |
| FortiWeb 7.6.x | 7.6.5 or later |
| FortiWeb 7.4.x | 7.4.10 or later |
| FortiWeb 7.2.x | 7.2.12 or later |
| FortiWeb 7.0.x | 7.0.12 or later |
## Technical Description
The vulnerability stems from insufficient path normalization in HTTP/HTTPS
request handling, allowing externally controlled paths to bypass directory
restrictions.
This may result in:
- Unauthorized access to backend administrative endpoints
- Exposure of sensitive configuration
- Potential manipulation of management interfaces
## Impact
If successfully exploited, attackers may achieve:
- Authentication bypass
- Administrative access
- Ability to view/modify configuration
- Possible service disruption
## Mitigation
If immediate patching is not possible:
1. Disable public HTTP/HTTPS administrative access.
2. Restrict admin interfaces to trusted internal networks.
3. Use firewall rules to limit admin-port access.
4. Monitor logs for traversal-like patterns.
## Remediation
**Upgrade to the nearest patched version as soon as possible.**
## Disclosure Timeline
| Date | Event |
|------|--------|
| 2025-XX-XX | Vulnerability discovered |
| 2025-XX-XX | Vendor notified |
| 2025-XX-XX | Patch development |
| 2025-XX-XX | Advisory published |
| 2025-XX-XX | CVE assigned |
# STATUS:
HIGH - CRITICAL
[+]Payload:
```
No! For security reasons!
```
# Reproduce:
[href](https://www.patreon.com/posts/cve-2025-64446-143637933)
# Demo:
[href](https://www.patreon.com/posts/cve-2025-64446-143637933)
# Time spent:
25:00:00
--
System Administrator - Infrastructure Engineer
Penetration Testing Engineer
Exploit developer at https://packetstormsecurity.com/
https://cve.mitre.org/index.html
https://cxsecurity.com/ and https://www.exploit-db.com/
home page: https://www.asc3t1c-nu11secur1ty.com/
hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E=
nu11secur1ty <https://www.asc3t1c-nu11secur1ty.com/>
--
System Administrator - Infrastructure Engineer
Penetration Testing Engineer
Exploit developer at https://packetstorm.news/
https://cve.mitre.org/index.html
https://cxsecurity.com/ and https://www.exploit-db.com/
0day Exploit DataBase https://0day.today/
home page: https://www.asc3t1c-nu11secur1ty.com/
hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E=
nu11secur1ty <http://nu11secur1ty.com/>