CVE-2025-34256 (GCVE-0-2025-34256)

Vulnerability from cvelistv5 – Published: 2025-12-05 17:18 – Updated: 2025-12-17 16:49
VLAI?
Title
Advantech WISE-DeviceOn Server < 5.4 Hard-coded JWT Key Authentication Bypass
Summary
Advantech WISE-DeviceOn Server versions prior to 5.4 contain a hard-coded cryptographic key vulnerability. The product uses a static HS512 HMAC secret for signing EIRMMToken JWTs across all installations. The server accepts forged JWTs that need only contain a valid email claim, allowing a remote unauthenticated attacker to generate arbitrary tokens and impersonate any DeviceOn account, including the root super admin. Successful exploitation permits full administrative control of the DeviceOn instance and can be leveraged to execute code on managed agents through DeviceOn’s remote management features.
Severity ?
10 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CWE
  • CWE-321 - Use of Hard-coded Cryptographic Key
Assigner
References
Impacted products
Vendor Product Version
Advantech Co., Ltd. WISE-DeviceOn Server Affected: 0 , < 5.4 (semver)
Create a notification for this product.
Credits
Alex Williams from Pellera Technologies
Show details on NVD website
To clipboard 

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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