CVE-2025-34237

MEDIUM

Advantech Webaccess/vpn < 1.1.5 - XSS

Title source: rule

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.

References (3)

[Product] https://icr.advantech.com/download/software

[Release Notes] https://icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025-11-06.pdf

[Third Party Advisory] https://www.vulncheck.com/advisories/advantech-webaccess-vpn-stored-xss-via-standalonevpnclientscontroller

Scores

CVSS v3 5.4

EPSS 0.0005

EPSS Percentile 16.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Classification

CWE

CWE-79

Status published

Affected Products (1)

advantech/webaccess\/vpn < 1.1.5

Timeline

Published Nov 06, 2025

Tracked Since Feb 18, 2026