Advantech WISE-DeviceOn Server <=5.3 XSS via /rmm/v1/action/defined
CVE-2025-34257 Published on December 5, 2025
Advantech WISE-DeviceOn Server < 5.4 Authenticated Stored XSS via action/defined
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.
Vulnerability Analysis
CVE-2025-34257 can be exploited with network access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2025-34257 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2025-34257
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Affected Versions
Advantech Co., Ltd. WISE-DeviceOn Server:- Before 5.4 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.