Cross-administrator script execution via SIP configuration
Published Sep 15, 2025 · Updated Aug 7, 2026
Stored XSS in WatchGuard Fireware OS 12.0 through 12.11.2 allows remote authenticated users to run script in another administrator's UI. The SIP Proxy configuration stores administrator-supplied content and later renders it without neutralizing executable script; WatchGuard has not identified the affected field. Exploitation requires an administrator session on a locally managed Firebox and a second management user to view the poisoned configuration, exposing that user's interface context to attacker-controlled script.
Summary
What happened
Stored XSS in WatchGuard Fireware OS 12.0 through 12.11.2 allows remote authenticated users to run script in another administrator's UI. The SIP Proxy configuration stores administrator-supplied content and later renders it without neutralizing executable script; WatchGuard has not identified the affected field. Exploitation requires an administrator session on a locally managed Firebox and a second management user to view the poisoned configuration, exposing that user's interface context to attacker-controlled script.
The record
- CVE
- CVE-2025-6947
- Published
- Sep 15, 2025
- Updated
- Aug 7, 2026
- Vendor
- WatchGuard Technologies, Inc.
- Product
- Fireware OS
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Sep 15, 2025CVE publishedPublication date reported by the CVE source.
- Aug 7, 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.
- Affected versionversion=12.0 <12.11.3
- Affected versionversion=12.0 <12.5.13
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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