CVE-2025-13938Network attack vector

Stored script execution via Autotask configuration

Published Dec 4, 2025 · Updated Aug 10, 2026

Stored XSS in WatchGuard Fireware OS allows remote authenticated users to execute script in another user's browser via Autotask settings. The Autotask Technology Integration configuration stores attacker-controlled values and later renders them without adequate output neutralization. Device Administrator access is required to change the configuration, and a different user must view the affected interface; the published impact is limited to that user's browser context.

CVSS severity4.8
Medium
EPSS probability0.20%
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 WatchGuard Fireware OS allows remote authenticated users to execute script in another user's browser via Autotask settings. The Autotask Technology Integration configuration stores attacker-controlled values and later renders them without adequate output neutralization. Device Administrator access is required to change the configuration, and a different user must view the affected interface; the published impact is limited to that user's browser context.

The record

CVE
CVE-2025-13938
Published
Dec 4, 2025
Updated
Aug 10, 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 10, 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
  2. Affected versionversion=12.0 <12.11.5
  3. Affected versionversion=2025.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WatchGuard Technologies, Inc. · Fireware OSversion=12.0; version=12.0 <12.11.5; version=2025.1

Published CVSS scores

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
6.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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
T1059.007Command and Scripting Interpreter: JavaScript/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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