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.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.084 (94.8th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-64447: held from 0.084 to 0.084.

EPSS over last 30 days · oldest: 0.084 · newest: 0.084 · change: 0.000

Affected products

Weakness classification (CWE)

References

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.