XSS in Advantech Wise-Deviceon Server
CVE-2025-34261
Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability in the /rmm/v1/devicegroups/ endpoint. When an authenticated user creates a device group, the name and description values are stored and later rendered in device group listings 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 device group, potentially enabling session compromise and unauthorized actions as the victim.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (15.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- advcloudfiles.advantech.com/cms/2ca1b071-fd78-4d7f-8a2a-7b4537a95d19/Security A… (vendor-advisory, patch)
- docs.deviceon.advantech.com/docs/resource/ (Product, product)
- www.vulncheck.com/advisories/advantech-wise-deviceon-server-authenticated-store… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-34261?
- CVE-2025-34261 is a medium-severity vulnerability in Advantech Wise-Deviceon Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-05.
- How severe is CVE-2025-34261?
- Medium severity. CVSS v3 base score is 5.4 out of 10.