BaseFortify

Publication date: 2025-11-06

Last updated on: 2025-11-28

Assigner: VulnCheck

Description

Advantech WebAccess/VPN versions prior to 1.1.5 contain a stored cross-site scripting (XSS) vulnerability via StandaloneVpnClientsController.addStandaloneVpnClientAction(). Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-11-06

Last Modified

2025-11-28

Generated

2026-07-06

AI Q&A

2025-11-06

EPSS Evaluated

2026-07-05

NVD

CVE-2025-34237

Affected Vendors & Products

Vendor	Product	Version / Range
advantech	webaccess\/vpn	to 1.1.5 (exc)

Helpful Resources

Exploitability

CWE

KEV

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

Executive Summary

This vulnerability is a stored cross-site scripting (XSS) issue in Advantech WebAccess/VPN versions prior to 1.1.5. It occurs in the StandaloneVpnClientsController.addStandaloneVpnClientAction() function, where insufficient validation or escaping of user-supplied input allows an attacker to inject and execute arbitrary scripts in the context of a victim's browser.

Impact Analysis

An attacker exploiting this vulnerability can execute arbitrary scripts in a victim's browser, potentially leading to session hijacking, theft of sensitive information, or performing actions on behalf of the victim without their consent.

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