Vulnerability · Published Oct 14, 2025 · Assigned by fortinet
CVE-2025-25255
Medium 4.8
In plain English
A medium-severity security flaw in FortiOS from Fortinet. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiOS | 7.6.0 – through 7.6.3 |
| Fortinet | FortiProxy | 7.6.0 – through 7.6.37.4.0 – through 7.4.117.2.0 – through 7.2.157.0.1 – through 7.0.22 |
Weakness: CWE-358 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C