CVE-2019-25394
Received Received - Intake

Stored XSS in Smoothwall Express modem.cgi Allows Script Injection

Publication date: 2026-02-16

Last updated on: 2026-02-20

Assigner: VulnCheck

Description
Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains multiple stored cross-site scripting vulnerabilities in the modem.cgi script that allow attackers to inject malicious scripts through POST parameters. Attackers can submit crafted payloads in parameters like INIT, HANGUP, SPEAKER_ON, SPEAKER_OFF, TONE_DIAL, and PULSE_DIAL to execute arbitrary JavaScript in users' browsers when the stored data is retrieved.

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Meta Information

Published
2026-02-16
Last Modified
2026-02-20
Generated
2026-07-06
AI Q&A
2026-02-16
EPSS Evaluated
2026-07-05
NVD
CVE-2019-25394
EUVD
EUVD-2019-19624

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
smoothwall smoothwall_express 3.1

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 exists in Smoothwall Express 3.1-SP4-polar-x86_64-update9 within the modem.cgi script. It involves multiple stored cross-site scripting (XSS) flaws that allow attackers to inject malicious JavaScript code through POST parameters.

Attackers can craft payloads in parameters such as INIT, HANGUP, SPEAKER_ON, SPEAKER_OFF, TONE_DIAL, and PULSE_DIAL. When the stored malicious data is later retrieved and rendered in users' browsers, the injected scripts execute, potentially compromising user sessions or data.

Impact Analysis

This vulnerability can lead to arbitrary JavaScript execution in the browsers of users who access the affected modem.cgi script. Such execution can result in session hijacking, theft of sensitive information, unauthorized actions performed on behalf of the user, or other malicious activities.

Compliance Impact

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