{"id":"CVE-2025-34257","title":"Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability in the /rmm/v1/action/defined endpoint","summary":"Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability in the /rmm/v1/action/defined endpoint. When an authenticated user creates a task, the defined_name value is stored and later …","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":"wise-deviceon_server","affected":["wise-deviceon_server < 5.4"],"patched":["wise-deviceon_server 5.4"],"published":"2025-12-05","updated":"2026-09-25","sourceUpdated":"2026-09-25T23:10:00.463","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-34257","references":[{"url":"https://advcloudfiles.advantech.com/cms/2ca1b071-fd78-4d7f-8a2a-7b4537a95d19/Security%20Advisory%20PDF%20File/SECURITY-ADVISORY----DeviceOn-20251208-2.pdf","label":"disclosure@vulncheck.com"},{"url":"https://docs.deviceon.advantech.com/docs/resource/","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/advantech-wise-deviceon-server-authenticated-stored-xss-via-action-defined","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00259,"epssPercentile":0.15676,"ingestedAt":"2026-09-25T23:21:16.897Z","slug":"CVE-2025-34257","body":"## Overview\n\nAdvantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability in the /rmm/v1/action/defined endpoint. When an authenticated user creates a task, the defined_name value is stored and later rendered in the Overview page without HTML sanitization. An attacker can inject malicious script into defined_name, which is then executed in the browser context of users who view the affected task, potentially enabling session compromise and unauthorized actions as the victim.\n\n## Affected\n\n- `wise-deviceon_server < 5.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `wise-deviceon_server 5.4`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}