XSS in Advantech Webaccess/vpn
CVE-2025-34236
Advantech WebAccess/VPN versions prior to 1.1.5 contain a stored cross-site scripting (XSS) vulnerability via NetworksController.addNetworkAction(). 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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (9.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Advantech Webaccess/vpn — versions 0
- Advantech Webaccess\/vpn
Weakness classification (CWE)
References
- icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025… (vendor-advisory, Release Notes, patch)
- www.vulncheck.com/advisories/advantech-webaccess-vpn-stored-xss-via-networkcont… (Third Party Advisory, third-party-advisory)
- icr.advantech.com/download/software (Product, product)
Frequently asked questions
- What is CVE-2025-34236?
- CVE-2025-34236 is a medium-severity vulnerability in Advantech Webaccess/vpn, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-11-06.
- How severe is CVE-2025-34236?
- Medium severity. CVSS v3 base score is 5.4 out of 10.