---
id: CVE-2025-0178
title: >-
  An Improper Input Validation vulnerability in WatchGuard Fireware OS allows an
  attacker with network access to manipulate the value of the HTTP Host header
  in requests sent to the Web UI
summary: >-
  An Improper Input Validation vulnerability in WatchGuard Fireware OS allows an
  attacker with network access to manipulate the value of the HTTP Host header
  in requests sent to the Web UI. An attacker could exploit this vulnerability
  to r…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-20
vendor: watchguard
product: fireware
affected:
  - 'fireware >= 12.0.0, < 12.11.1'
  - 'fireware >= 12.5, < 12.5.13'
patched:
  - fireware 12.5.13
published: '2025-02-14'
updated: '2026-08-08'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-0178'
references:
  - url: 'https://psirt.watchguard.com/CVE-2025-0178'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
  - url: 'https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00003'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
tags:
  - nvd
epss: 0.00235
epssPercentile: 0.14717
ingestedAt: '2026-08-08T03:20:31.449Z'
---

## Overview

An Improper Input Validation vulnerability in WatchGuard Fireware OS allows an attacker with network access to manipulate the value of the HTTP Host header in requests sent to the Web UI. An attacker could exploit this vulnerability to redirect users to malicious websites, poison the web cache, or inject malicious JavaScript into responses sent by the Web UI.

## Affected

- `fireware >= 12.0.0, < 12.11.1`
- `fireware >= 12.5, < 12.5.13`

## Remediation

Upgrade past the affected range:

- `fireware 12.5.13`