Stored XSS Vulnerability in Advantech WISE-DeviceOn Server
CVE-2025-34257

5.1MEDIUM

Key Information:

Vendor

Advantech Co., Ltd.

Status
Wise-deviceon Server
Vendor
CVE Published:
5 December 2025

What is CVE-2025-34257?

Advantech WISE-DeviceOn Server versions before 5.4 contain a vulnerability within the /rmm/v1/action/defined endpoint, allowing attackers to exploit stored cross-site scripting (XSS). When authenticated users create tasks, the 'defined_name' value is retained and displayed on the Overview page without proper HTML sanitization. This oversight enables an attacker to inject malicious scripts, leading to potential session hijack and unauthorized actions executed in the context of users who access the compromised task.

Affected Version(s)

WISE-DeviceOn Server 0 < 5.4

References

https://advcloudfiles.advantech.com/cms/2ca1b071-fd78-4d7...
vendor-advisorypatch
https://docs.deviceon.advantech.com/docs/resource/
product
https://www.vulncheck.com/advisories/advantech-wise-devic...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Alex Williams from Pellera Technologies
JSON
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CVE-2025-34257 : Stored XSS Vulnerability in Advantech WISE-DeviceOn Server