FortiWeb Cookie Integrity Flaw 8.0.0-8.0.1 / 7.6.0-7.6.5 (CVE-2025-64447)
CVE-2025-64447 Published on December 9, 2025
A reliance on cookies without validation and integrity checking vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.1, FortiWeb 7.6.0 through 7.6.5, FortiWeb 7.4.0 through 7.4.10, FortiWeb 7.2.0 through 7.2.11, FortiWeb 7.0.0 through 7.0.11 may allow an unauthenticated attacker to execute arbitrary operations on the system via crafted HTTP or HTTPS request via forged cookies, requiring prior knowledge of the FortiWeb serial number.
Vulnerability Analysis
CVE-2025-64447 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
Reliance on Cookies without Validation and Integrity Checking
The application relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user. Attackers can easily modify cookies, within the browser or by implementing the client-side code outside of the browser. Reliance on cookies without detailed validation and integrity checking can allow attackers to bypass authentication, conduct injection attacks such as SQL injection and cross-site scripting, or otherwise modify inputs in unexpected ways.
Products Associated with CVE-2025-64447
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Affected Versions
Fortinet FortiWeb:- Version 8.0.0, <= 8.0.1 is affected.
- Version 7.6.0, <= 7.6.5 is affected.
- Version 7.4.0, <= 7.4.10 is affected.
- Version 7.2.0, <= 7.2.11 is affected.
- Version 7.0.0, <= 7.0.11 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.