Vulnerability in Fortinet Fortios
CVE-2025-25255
An Improperly Implemented Security Check for Standard vulnerability [CWE-358] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiProxy 7.6.0 through 7.6.3, FortiProxy 7.4.0 through 7.4.11, FortiProxy 7.2 all versions, FortiProxy 7.0.1 through 7.0.22 may allow an unauthenticated proxy user to bypass the domain fronting protection feature via crafted HTTP requests.
EPSS: 0.004 (32.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Fortinet Fortios — versions 7.6.0
- Fortinet Fortiproxy — versions 7.6.0, 7.4.0, 7.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@fortinet.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-25255?
- CVE-2025-25255 is a medium-severity vulnerability in Fortinet Fortios, classified under CWE-358. CVSS score: 5.3/10. Published 2025-10-14.
- How severe is CVE-2025-25255?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-25255 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.