CVE-2025-34259: Advantech WISE-DeviceOn Server · XSS or 'Cross-site Scripting'
Affects Advantech WISE-DeviceOn ServerSource CVE Database V5
Not known to be exploited · CVSS 5.1 Medium : upgrade to 5.4 when convenient.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 17% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.4
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 5 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade Advantech WISE-DeviceOn Server to 5.4.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Advantech Co., Ltd. WISE-DeviceOn Server | Affected
| Fixed in
|
AI-suggested
If you cannot patch yet, restrict authenticated user permissions to trusted users only and avoid interacting with untrusted map entries.
Description
Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability in the /rmm/v1/devicemap/building endpoint. When an authenticated user creates a map entry, the name parameter is stored and later rendered in the map list UI without HTML sanitzation. An attacker can inject malicious script into the map entry name, which is then executed in the browser context of users who view or interact with the affected map entry, potentially enabling session compromise and unauthorized actions as the victim.
References
- advcloudfiles.advantech.com/cms/2ca1b071-fd78-4d7f-8a2a-7b4537a95d19/Security%20Advisory%20PDF%20File/SECURITY-ADVISORY----DeviceOn-20251208-2.pdf (opens in a new tab)
- docs.deviceon.advantech.com/docs/resource/ (opens in a new tab)
- vulncheck.com/advisories/advantech-wise-deviceon-server-authenticated-stored-xss-via-devicemap-building (opens in a new tab)