CVE-2025-34257 MEDIUM

CVE-2025-34257: Advantech WISE-DeviceOn Server < 5.4 Authenticated Stored XSS via action/defined

Vendor Advantech Co., Ltd.
Product WISE-DeviceOn Server
Weakness CWE-79 · XSS
Published December 5, 2025
Last update May 14, 2026

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 5, 2025 CVE published
May 14, 2026 Record updated