CVE-2025-6999: CWE-444 in WatchGuard Fireware OS
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.
AI Analysis
Technical Summary
This vulnerability involves HTTP Request Smuggling in the Authentication portal of WatchGuard Fireware OS 12.0, enabling an attacker to evade request parameter sanitation and conduct a reflected self-XSS attack. Despite the technical possibility, the vendor does not consider this vulnerability to have a practical exploit chain or significant security consequences.
Potential Impact
The vulnerability could allow a remote attacker to perform reflected self-XSS by evading request parameter sanitation through HTTP Request Smuggling. However, the vendor indicates that no practical exploit chain exists that would result in meaningful security impact, limiting the real-world risk.
Mitigation Recommendations
No official patch or fix is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Given the vendor's assessment of limited practical impact, immediate remediation may not be required.
CVE-2025-6999: CWE-444 in WatchGuard Fireware OS
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.
CVSS v4.0
Score 6.9medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves HTTP Request Smuggling in the Authentication portal of WatchGuard Fireware OS 12.0, enabling an attacker to evade request parameter sanitation and conduct a reflected self-XSS attack. Despite the technical possibility, the vendor does not consider this vulnerability to have a practical exploit chain or significant security consequences.
Potential Impact
The vulnerability could allow a remote attacker to perform reflected self-XSS by evading request parameter sanitation through HTTP Request Smuggling. However, the vendor indicates that no practical exploit chain exists that would result in meaningful security impact, limiting the real-world risk.
Mitigation Recommendations
No official patch or fix is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Given the vendor's assessment of limited practical impact, immediate remediation may not be required.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- WatchGuard
- Date Reserved
- 2025-07-02T00:11:51.723Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 68c884bf6a59ddba4fb1ef0b
Added to database: 09/15/2025, 21:27:27 UTC
Last enriched: 08/11/2026, 15:24:17 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 171
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