CVE-2026-13374
Received Received - Intake

Stored XSS in WatchGuard Fireware OS via ConnectWise Integration

Publication date: 2026-07-03

Last updated on: 2026-07-03

Assigner: WatchGuard Technologies, Inc.

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. This vulnerability is an additional unmitigated attack path for CVE-2025-13937. This issue affects Fireware OS 12.4 up to and including 12.12, 12.5 up to and including 12.5.18, and 2025.1 up to and including 2026.2.

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Meta Information

Published
2026-07-03
Last Modified
2026-07-03
Generated
2026-07-03
AI Q&A
2026-07-03
EPSS Evaluated
N/A
NVD
CVE-2026-13374
EUVD
EUVD-2026-41449

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
watchguard fireware_os to 12.12 (inc)
watchguard fireware_os to 12.5.18 (inc)
watchguard fireware_os to 2026.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

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Executive Summary

This vulnerability is a Stored Cross-site Scripting (XSS) issue in the WatchGuard Fireware OS, specifically in the ConnectWise Technology Integration module. It occurs due to improper neutralization of input during web page generation, allowing malicious scripts to be stored and executed within the application.

This vulnerability represents an additional unmitigated attack path related to a previously known issue identified as CVE-2025-13937.

Impact Analysis

An attacker exploiting this Stored XSS vulnerability could inject malicious scripts that execute in the context of users accessing the affected web interface. This can lead to unauthorized actions, theft of sensitive information such as session tokens, or manipulation of the web application behavior.

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