BaseFortify

Publication date: 2025-10-14

Last updated on: 2025-12-09

Assigner: Fortinet, Inc.

Description

An Improperly Implemented Security Check for Standard vulnerability [CWE-358] 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.

CVSS Scores

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Meta Information

Published

2025-10-14

Last Modified

2025-12-09

Generated

2026-07-06

AI Q&A

2025-10-14

EPSS Evaluated

2026-07-05

NVD

CVE-2025-25255

Affected Vendors & Products

Vendor	Product	Version / Range
fortinet	fortios	From 7.4.0 (inc) to 7.4.9 (inc)
fortinet	fortiproxy	From 7.6.0 (inc) to 7.6.4 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-358	The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.

Attack-Flow Graph

Executive Summary

This vulnerability is an improperly implemented security check in FortiProxy and FortiOS versions specified, which allows an authenticated proxy user to bypass the domain fronting protection feature by sending specially crafted HTTP requests.

Impact Analysis

An attacker who is an authenticated proxy user could bypass domain fronting protections, potentially allowing them to access or route traffic in ways that are normally blocked, which could lead to unauthorized access or data exposure.

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