Path Traversal in Advantech Webaccess/vpn
CVE-2025-34238
Advantech WebAccess/VPN versions prior to 1.1.5 contain an absolute path traversal via AjaxStandaloneVpnClientsController.ajaxDownloadRoadWarriorConfigFileAction() that allows an authenticated network administrator to cause the application to read and return the contents of arbitrary files the web user (www-data) can access.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · 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-path-traversal-via-ajaxsta… (Third Party Advisory, third-party-advisory)
- icr.advantech.com/download/software (Product, product)
Frequently asked questions
- What is CVE-2025-34238?
- CVE-2025-34238 is a medium-severity vulnerability in Advantech Webaccess/vpn, classified under Path Traversal. CVSS score: 6.5/10. Published 2025-11-06.
- How severe is CVE-2025-34238?
- Medium severity. CVSS v3 base score is 6.5 out of 10.