CVE-2025-34237: Advantech WebAccess/VPN versions prior to 1.1.5 contain a stored cross-site scripting (XSS) vulnerability via…
CVE-2025-34237 · Severity: medium · CVSS 5.4 · Published 2025-11-06
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.
No. Junglewise Threat Intelligence has no report of CVE-2025-34237 being exploited in the wild.
How severe is CVE-2025-34237?
Medium severity, with a CVSS score of 5.4, published 6 November 2025.
Which products and versions are affected?
Advantech Vpn, Advantech Webaccess. The advisory does not name versions.
Is there a fix for CVE-2025-34237?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-34237?
Check whether you run Advantech Vpn or Advantech Webaccess. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.