CVE-2025-34237 MEDIUM

CVE-2025-34237: Advantech WebAccess/VPN < 1.1.5 Stored XSS via StandaloneVpnClientsController.addStandaloneVpnClientAction()

Vendor Advantech

Product WebAccess/VPN

Weakness CWE-79 · XSS

Published November 6, 2025

Last update November 17, 2025

View on NVD All CVEs

CVSS base score

6.3/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction —

Confidentiality —

Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

November 6, 2025 CVE published

November 17, 2025 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-34237 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html

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