CVE-2025-34266 - CVE House
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Status published Medium CVE-2025-34266

Advantech WISE-DeviceOn Server < 5.4 Authenticated Stored XSS via plugin-config/addins/menus

Vulnerability Description

Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability in the /rmm/v1/plugin-config/addins/menus endpoint. When an authenticated user adds or edits an AddIns menu entry, the label and path values are stored in plugin configuration data and later rendered in the AddIns UI without proper HTML sanitation. An attacker can inject malicious script into either field, which is then executed in the browser context of users who view or interact with the affected AddIns entry, potentially enabling session compromise and unauthorized actions as the victim.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Alex Williams from Pellera Technologies

Affected Vendor

Advantech Co., Ltd.

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Affected Software

WISE-DeviceOn Server
Vulnerable Versions:
0

Timeline

Official Publish: December 5th, 2025
Last Modified: May 14th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)