CVE-2025-34237

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 v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://icr.advantech.com/download/software	Product
https://icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025-11-06.pdf	Release Notes
https://www.vulncheck.com/advisories/advantech-webaccess-vpn-stored-xss-via-standalonevpnclientscontroller	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:advantech:webaccess\/vpn:*:*:*:*:*:*:*:*

History

28 Nov 2025, 16:44

Type	Values Removed	Values Added
First Time		Advantech webaccess\/vpn Advantech
CPE		cpe:2.3:a:advantech:webaccess\/vpn::::::::
References	~~() https://icr.advantech.com/download/software -~~	() https://icr.advantech.com/download/software - Product
References	~~() https://icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025-11-06.pdf -~~	() https://icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025-11-06.pdf - Release Notes
References	~~() https://www.vulncheck.com/advisories/advantech-webaccess-vpn-stored-xss-via-standalonevpnclientscontroller -~~	() https://www.vulncheck.com/advisories/advantech-webaccess-vpn-stored-xss-via-standalonevpnclientscontroller - Third Party Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.4

06 Nov 2025, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-11-06 20:15

Updated : 2025-11-28 16:44

NVD link : CVE-2025-34237

Mitre link : CVE-2025-34237

CVE.ORG link : CVE-2025-34237

JSON object : View

Products Affected

advantech

webaccess\/vpn

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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