SB2025120952 - Authentication bypass in FortiWeb

Description

This security bulletin contains information about 1 vulnerability.

1) Reliance on Cookies without Validation and Integrity Checking (CVE-ID: CVE-2025-64447)

CWE-ID: CWE-565 - Reliance on Cookies without Validation and Integrity Checking

CVSSv4: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The vulnerability exists due to reliance on cookies without validation and integrity checking. An unauthenticated attacker can execute arbitrary operations on the system via crafted HTTP or HTTPS request via forged cookies requiring knowledge of the FortiWeb serial number.

Remediation

Install update from vendor's website.

References

• https://www.fortiguard.com/psirt/FG-IR-25-945
• https://www.zerodayinitiative.com/advisories/ZDI-25-1094/