HTTP Request Smuggling Vulnerability in WatchGuard Fireware OS Authentication Portal
CVE-2025-6999

6.9MEDIUM

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
15 September 2025

What is CVE-2025-6999?

A vulnerability has been identified in the Authentication portal of WatchGuard's Fireware OS, allowing remote attackers to exploit HTTP Request Smuggling techniques. This vulnerability can result in the evasion of request parameter sanitation, which in turn may enable attackers to execute a reflected self-Cross-Site Scripting (XSS) attack. Impacted versions span from 12.0 through 12.11.2, making it crucial for users of WatchGuard Fireware OS to assess their systems and apply necessary updates.

Affected Version(s)

Fireware OS 12.0 <= 12.11.2

References

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-...

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-6999 : HTTP Request Smuggling Vulnerability in WatchGuard Fireware OS Authentication Portal