CVE-2025-34257: Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability

Q: How do I fix CVE-2025-34257?

wise-deviceon server: upgrade to 5.4. Exact commands for each OS are on this page.

Q: Is CVE-2025-34257 being exploited?

CVE-2025-34257 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-34257 affect?

CVE-2025-34257 affects wise-deviceon server. Severity is medium (CVSS 5.4). Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability in the /rmm/v1/action/defined endpoint. When an authenticated user creates a task, the defined_name value is stored and later ren

Q: How urgent is CVE-2025-34257?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2025-34257 is a medium-severity flaw (CVSS 5.4) affecting wise-deviceon server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability in the /rmm/v1/action/defined endpoint. When an authenticated user creates a task, the defined_name value is stored and later rendered in the Overview page without HTML sanitization. An attacker can inject malicious script into defined_name, which is then executed in the browser context of users who view the affected task, potentially en

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-12-05
Last modified	2026-09-25

Publisher (CNA): VulnCheck · Vendor: advantech

Last updated 2026-09-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-05 18:15 UTCPublished CVE record published
2026-09-25 23:10 UTCUpdated Record last modified

advantech wise-deviceon server UPGRADE

Affected: < 5.4

Fixed in: 5.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wise-deviceon-server || rpm -q wise-deviceon-server || wise-deviceon-server --version

2. UPGRADE to 5.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wise-deviceon-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wise-deviceon-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-34257?

wise-deviceon server: upgrade to 5.4. Exact commands for each OS are on this page.

Is CVE-2025-34257 being exploited?

CVE-2025-34257 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-34257 affect?

CVE-2025-34257 affects wise-deviceon server. Severity is medium (CVSS 5.4). Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability in the /rmm/v1/action/defined endpoint. When an authenticated user creates a task, the defined_name value is stored and later ren

How urgent is CVE-2025-34257?

Priority 23/100. No elevated risk signals yet.

Software pages

Advantech vulnerabilities

Related CVEs

CVE-2025-34259 MEDIUM 5.4 UPGRADE Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability
CVE-2025-34260 MEDIUM 5.4 UPGRADE Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability
CVE-2025-34261 MEDIUM 5.4 UPGRADE Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability
CVE-2025-34258 MEDIUM 5.4 UPGRADE Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability
CVE-2025-34262 MEDIUM 5.4 UPGRADE Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability

References

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