CVE-2025-0178 WatchGaurd Firebox Host Header Injection Vulnerability

What is CVE-2025-0178?

CVE-2025-0178 is a medium-severity vulnerability in Watchguard Fireware, published on 14 Feb 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

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.

Weakness: CWE-20

Which versions are affected by CVE-2025-0178?

It affects 1 product.

Products include Watchguard Fireware.

How do I fix CVE-2025-0178?

No fix has been published for CVE-2025-0178 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-0178 being exploited?

There is no known exploitation of CVE-2025-0178 in the wild and no public exploit code.

Other vulnerabilities in Watchguard Fireware

• CVE-2022-26318 WatchGuard Firebox and XTM Appliances Arbitrary Code Execution Exploited Critical 9.8
• CVE-2025-14733 WatchGuard Firebox Out of Bounds Write Exploited Critical 9.3
• CVE-2025-9242 WatchGuard Firebox Out-of-Bounds Write Exploited Critical 9.3
• CVE-2022-23176 WatchGuard Firebox and XTM Privilege Escalation Exploited High 8.8
• CVE-2022-31789 Integer overflow in n/a Critical 9.8

All Watchguard Fireware vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-4h8g-6mc6-vxxj.