Vulnerability Information Title Advantech WISE-DeviceOn Server < 5.4 Authenticated Stored XSS via devices/name/{agent_id} Severity MEDIUM Date December 5, 2025 CVE CVE-2025-34262 CWE CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') CVSS V4 Vector 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 References Advantech Security Advisory DeviceOn Software Download Credit Alex Williams from Pellera Technologies Description Advantech WISE-DeviceOn Server versions prior to 5.4 contain a stored cross-site scripting (XSS) vulnerability in the /rmm/v1/devices/name/{agent_id} endpoint. When an authenticated user renames a device, the new_name value is stored and later rendered in device listings or detail views without proper HTML sanitization. An attacker can inject malicious script into the device name, which is then executed in the browser context of users who view or interact with the affected device, potentially enabling session compromise and unauthorized actions as the victim.