---
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'
---

## Overview

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 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.

## Affected

- `wise-deviceon_server < 5.4`

## Remediation

Upgrade past the affected range:

- `wise-deviceon_server 5.4`