CVE-2025-48840
Received Received - Intake
Authentication Bypass in Fortinet FortiWeb via Hostname Spoofing

Publication date: 2026-03-10

Last updated on: 2026-03-12

Assigner: Fortinet, Inc.

Description
An authentication bypass by spoofing vulnerability in Fortinet FortiWeb 7.6.0 through 7.6.3, FortiWeb 7.4.0 through 7.4.8, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow a remote unauthenticated attacker to bypass hostname restrictions via a specially crafted request.
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Meta Information
Published
2026-03-10
Last Modified
2026-03-12
Generated
2026-06-16
AI Q&A
2026-03-10
EPSS Evaluated
2026-06-14
NVD
CVE-2025-48840
EUVD
EUVD-2025-208486
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
fortinet fortiweb From 7.6.0 (inc) to 7.6.4 (exc)
fortinet fortiweb From 7.0.0 (inc) to 7.4.9 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-290 This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
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Executive Summary

This vulnerability is an authentication bypass by spoofing in Fortinet FortiWeb versions 7.0 through 7.6.3. It allows a remote unauthenticated attacker to bypass hostname restrictions by sending a specially crafted request.

Impact Analysis

An attacker exploiting this vulnerability can bypass hostname restrictions without authentication, potentially allowing unauthorized access or actions that should be restricted based on hostname. This could lead to limited integrity impacts but no direct confidentiality or availability impacts according to the CVSS score.

Compliance Impact

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Detection Guidance

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