Medium [CVE-2025-1239] WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in Blocked Sites List
This medium-severity WatchGuard advisory covers CVE-2025-1239 affecting Fireware OS.
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Summary
A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Blocked Sites list. An authenticated remote attacker with administrator privileges could exploit this vulnerability to execute arbitrary JavaScript code in the Firebox management interface of another management user.
Affected product named by the advisory: Fireware OS.
- Fireware OS 12.0 before 12.11.1
- Fireware OS 12.0 before 12.5.13
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 12.11.1
- 12.5.13
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 12.11.1, 12.5.13. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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