{"id":"CVE-2025-34237","title":"Advantech WebAccess/VPN versions prior to 1.1.5 contain a stored cross-site scripting (XSS) vulnerability via StandaloneVpnClientsController.addStandaloneVpnClientAction()","summary":"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 a…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"advantech","product":"webaccess/vpn","affected":["webaccess/vpn < 1.1.5"],"patched":["webaccess/vpn 1.1.5"],"published":"2025-11-06","updated":"2026-10-07","sourceUpdated":"2026-10-07T21:10:00.200","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-34237","references":[{"url":"https://icr.advantech.com/download/software","label":"disclosure@vulncheck.com"},{"url":"https://icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025-11-06.pdf","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/advantech-webaccess-vpn-stored-xss-via-standalonevpnclientscontroller","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00216,"epssPercentile":0.11025,"ingestedAt":"2026-10-07T21:54:14.966Z","slug":"CVE-2025-34237","body":"## Overview\n\nAdvantech 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.\n\n## Affected\n\n- `webaccess/vpn < 1.1.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `webaccess/vpn 1.1.5`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}