Description
An HTTP Request Smuggling [CWE-444] vulnerability in the Authentication portal of WatchGuard Fireware OS allows a remote attacker to evade request parameter sanitation and perform a reflected self-Cross-Site Scripting (XSS) attack.

WatchGuard does not believe there is a practical exploit chain with a meaningful security impact for this vulnerability.
Published: 2025-09-15
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

Vendor Solution

Fireware OS 12.11.3

Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-29270 An HTTP Request Smuggling [CWE-444] vulnerability in the Authentication portal of WatchGuard Fireware OS allows a remote attacker to evade request parameter sanitation and perform a reflected self-Cross-Site Scripting (XSS) attack.This issue affects Fireware OS: from 12.0 through 12.11.2.
History

Mon, 10 Aug 2026 15:45:00 +0000

Type Values Removed Values Added
Description An HTTP Request Smuggling [CWE-444] vulnerability in the Authentication portal of WatchGuard Fireware OS allows a remote attacker to evade request parameter sanitation and perform a reflected self-Cross-Site Scripting (XSS) attack.This issue affects Fireware OS: from 12.0 through 12.11.2. An HTTP Request Smuggling [CWE-444] vulnerability in the Authentication portal of WatchGuard Fireware OS allows a remote attacker to evade request parameter sanitation and perform a reflected self-Cross-Site Scripting (XSS) attack. WatchGuard does not believe there is a practical exploit chain with a meaningful security impact for this vulnerability.
First Time appeared Watchguard fireware Os
CPEs cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*
Vendors & Products Watchguard fireware Os
References

Wed, 17 Sep 2025 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Watchguard
Watchguard fireware
Vendors & Products Watchguard
Watchguard fireware

Tue, 16 Sep 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 15 Sep 2025 21:30:00 +0000

Type Values Removed Values Added
Description An HTTP Request Smuggling [CWE-444] vulnerability in the Authentication portal of WatchGuard Fireware OS allows a remote attacker to evade request parameter sanitation and perform a reflected self-Cross-Site Scripting (XSS) attack.This issue affects Fireware OS: from 12.0 through 12.11.2.
Title WatchGuard Firebox Authentication Portal Request Smuggling Vulnerability
Weaknesses CWE-444
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Watchguard Fireware Fireware Os
cve-icon MITRE

Status: PUBLISHED

Assigner: WatchGuard

Published:

Updated: 2026-08-10T15:26:28.073Z

Reserved: 2025-07-02T00:11:51.723Z

Link: CVE-2025-6999

cve-icon Vulnrichment

Updated: 2025-09-16T15:41:41.972Z

cve-icon NVD

Status : Deferred

Published: 2025-09-15T22:15:34.760

Modified: 2026-08-10T16:19:28.600

Link: CVE-2025-6999

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-17T10:52:21Z

Weaknesses
  • CWE-444

    Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')