CVE-2025-6946Network attack vector

Cross-user script execution via stored IPS input

Published Dec 4, 2025 · Updated Aug 8, 2026

Stored XSS in the IPS configuration of WatchGuard Fireware OS allows remote attackers to execute arbitrary JavaScript. The locally managed Firebox interface stores insufficiently neutralized IPS configuration input and renders it in another management user's browser. Exploitation requires an authenticated administrator to plant the payload and another management user to view the affected interface; impact is limited to script execution in that user's browser.

CVSS severity4.8
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in the IPS configuration of WatchGuard Fireware OS allows remote attackers to execute arbitrary JavaScript. The locally managed Firebox interface stores insufficiently neutralized IPS configuration input and renders it in another management user's browser. Exploitation requires an authenticated administrator to plant the payload and another management user to view the affected interface; impact is limited to script execution in that user's browser.

The record

CVE
CVE-2025-6946
Published
Dec 4, 2025
Updated
Aug 8, 2026
Vendor
WatchGuard Technologies, Inc.
Product
Fireware OS
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.0 <12.11.3
  2. Affected versionversion=12.0 <12.5.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WatchGuard Technologies, Inc. · Fireware OSversion=12.0 <12.11.3; version=12.0 <12.5.13

Published CVSS scores

4.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8WatchGuard Technologies, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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