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CVE-2025-34261VulnerabilityPublished Updated

CVE-2025-34261: Advantech WISE-DeviceOn Server · XSS or 'Cross-site Scripting'

Affects Advantech WISE-DeviceOn ServerSource CVE Database V5

0

Not known to be exploited · CVSS 5.1 Medium : upgrade to 5.4 when convenient.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 2026-10-26.

What to do

Upgrade Advantech WISE-DeviceOn Server to 5.4.

Affected software

ProductAffectedFixed in
Advantech Co., Ltd. WISE-DeviceOn ServerAffected
  • =0
  • <5.4
Fixed in
  • 5.4

AI-suggested

If you cannot patch yet, restrict authenticated user permissions to trusted users only and avoid viewing or interacting with untrusted device group entries.

Description

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.

References

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