Medium severity · published Dec 4, 2025
CVE-2025-13937
WatchGuard Firebox Stored Cross-Site-Scripting (XSS) Vulnerability in ConnectWise Technology Integration Configuration
6.1
CVSS
0.2%
EPSS
No
On KEV
Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS (ConnectWise Technology Integration module) allows Stored XSS.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Fireware OS · WatchGuard
2025.1 before 2025.1.3; 12.0 before 12.11.5; 12.0 before 12.5.14 · source: vendor
FI
Fireware · Watchguard
2025.1 before 2025.1.3; 12.0.0 before 12.11.5; 12.5 before 12.5.14 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-13937
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-13937
psirt.watchguard.com
https://psirt.watchguard.com/CVE-2025-13937
Vendor Advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00022
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