CVE-2025-34266: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in Advantech Co., Ltd. WISE-DeviceOn Server
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.
AI Analysis
Technical Summary
CVE-2025-34266 is a stored XSS vulnerability in Advantech WISE-DeviceOn Server prior to version 5.4. The flaw exists in the /rmm/v1/plugin-config/addins/menus endpoint where label and path values submitted by authenticated users are stored and rendered in the AddIns UI without adequate HTML sanitization. This improper neutralization of input (CWE-79) allows injection of malicious scripts that execute in the context of other users' browsers, potentially enabling session hijacking or unauthorized actions.
Potential Impact
Successful exploitation allows an attacker with authenticated access to inject scripts that execute in other users' browsers when they view or interact with the compromised AddIns menu entries. This can lead to session compromise and unauthorized actions performed with the victim's privileges.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user permissions to trusted personnel only and avoid interacting with untrusted AddIns menu entries.
CVE-2025-34266: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in Advantech Co., Ltd. WISE-DeviceOn Server
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.
CVSS v4.0
Score 5.1medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-34266 is a stored XSS vulnerability in Advantech WISE-DeviceOn Server prior to version 5.4. The flaw exists in the /rmm/v1/plugin-config/addins/menus endpoint where label and path values submitted by authenticated users are stored and rendered in the AddIns UI without adequate HTML sanitization. This improper neutralization of input (CWE-79) allows injection of malicious scripts that execute in the context of other users' browsers, potentially enabling session hijacking or unauthorized actions.
Potential Impact
Successful exploitation allows an attacker with authenticated access to inject scripts that execute in other users' browsers when they view or interact with the compromised AddIns menu entries. This can lead to session compromise and unauthorized actions performed with the victim's privileges.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user permissions to trusted personnel only and avoid interacting with untrusted AddIns menu entries.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2025-04-15T19:15:22.579Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 693316b0f88dbe026cfdbe39
Added to database: 12/05/2025, 17:30:24 UTC
Last enriched: 08/15/2026, 13:42:38 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 181
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