What is CVE-2025-64447?

CVE-2025-64447 is a high-severity vulnerability in Fortinet Fortiweb, classified under Reliance on Cookies without Validation and Integrity Checking. CVSS score: 8.1/10. Published 2025-12-09.

How severe is CVE-2025-64447?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Fortinet Fortiweb

CVE-2025-64447

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.

EPSS: 0.077 (93.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Fortinet Fortiweb — versions 8.0.0, 7.6.0, 7.4.0

Weakness classification (CWE)

CWE-565 — Reliance on Cookies without Validation and Integrity Checking

References

psirt@fortinet.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-64447?: CVE-2025-64447 is a high-severity vulnerability in Fortinet Fortiweb, classified under Reliance on Cookies without Validation and Integrity Checking. CVSS score: 8.1/10. Published 2025-12-09.
How severe is CVE-2025-64447?: High severity. CVSS v3 base score is 8.1 out of 10.