CVE-2025-34257 Advantech WISE-DeviceOn Server < 5.4 Authenticated Stored XSS via action/defined
Authenticated attackers can inject scripts via task names in Advantech WISE-DeviceOn Server, leading to session compromise for other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-34257?
CVE-2025-34257 is a medium-severity cross-site scripting vulnerability in Advantech Co., Ltd. WISE-DeviceOn Server, published on 5 Dec 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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 enabling session compromise and unauthorized actions as the victim.
Weakness: CWE-79
Which versions are affected by CVE-2025-34257?
It affects 1 product.
Products include Advantech Wise-Deviceon Server.
How do I fix CVE-2025-34257?
No fix has been published for CVE-2025-34257 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-34257 being exploited?
There is no known exploitation of CVE-2025-34257 in the wild and no public exploit code.
Other vulnerabilities in Advantech Co., Ltd. WISE-DeviceOn Server
- CVE-2025-34256 Advantech WISE-DeviceOn Server < 5.4 Hard-coded JWT Key Authentication Bypass
- CVE-2025-34258 Advantech WISE-DeviceOn Server < 5.4 Authenticated Stored XSS via devicemap/plan
- CVE-2025-34259 Advantech WISE-DeviceOn Server < 5.4 Authenticated Stored XSS via devicemap/building
- CVE-2025-34260 Advantech WISE-DeviceOn Server < 5.4 Authenticated Stored XSS via action/schedule
- CVE-2025-34261 Advantech WISE-DeviceOn Server < 5.4 Authenticated Stored XSS via devicegroups/
Sources
Also known as GHSA-jqf3-hfq7-53x7.