CVE-2025-34263 is a stored cross-site scripting (XSS) vulnerability identified in Advantech Co., Ltd.'s WISE-DeviceOn Server, affecting versions prior to 5.4. The vulnerability resides in the /rmm/v1/plugin-config/dashboards/menus REST API endpoint, which allows authenticated users to add or edit dashboard entries. Specifically, the 'label' and 'path' fields of dashboard entries are stored in plugin configuration data without proper HTML sanitization. When these fields are rendered in the dashboard user interface, the lack of input neutralization enables malicious script injection. An attacker with authenticated access can exploit this by injecting JavaScript payloads into these fields. When other users view or interact with the compromised dashboard, the injected scripts execute within their browser context, potentially allowing session cookie theft, user impersonation, or unauthorized actions within the application. The vulnerability requires the attacker to have at least low-level privileges (authenticated user) and some user interaction (viewing the dashboard). The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required beyond authentication (PR:L), user interaction required (UI:P), and low impact on confidentiality and integrity (VC:L, VI:L) with no impact on availability (VA:N). No public exploits are currently known, and no official patches have been linked yet. This vulnerability is classified under CWE-79, which covers improper neutralization of input during web page generation, a common cause of XSS vulnerabilities. Given the nature of the WISE-DeviceOn Server as an industrial IoT device management platform, exploitation could lead to unauthorized control or data leakage within industrial environments.

For European organizations, especially those in industrial sectors relying on Advantech WISE-DeviceOn Server for IoT device management, this vulnerability poses a risk of session hijacking and unauthorized actions within the management console. Successful exploitation could allow attackers to execute arbitrary scripts in the context of legitimate users, potentially leading to credential theft, privilege escalation, or manipulation of device configurations. This could disrupt operational technology (OT) environments, leading to operational downtime or safety risks. The medium CVSS score reflects moderate impact, but the actual risk depends on the deployment scale and user roles. Since the vulnerability requires authenticated access, insider threats or compromised credentials increase risk. The lack of known exploits reduces immediate threat but does not eliminate risk, especially as attackers may develop exploits over time. European critical infrastructure and manufacturing sectors using this product are particularly sensitive to such vulnerabilities due to the potential cascading effects on industrial processes and supply chains.

1. Upgrade Advantech WISE-DeviceOn Server to version 5.4 or later once available, as this version addresses the vulnerability. 2. Until patches are available, restrict dashboard editing privileges to trusted administrators only, minimizing the number of users who can inject malicious input. 3. Implement strict input validation and output encoding on the server side for all user-supplied data, especially in dashboard configuration fields. 4. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in the dashboard UI. 5. Monitor logs for unusual dashboard configuration changes or unexpected user behavior indicative of exploitation attempts. 6. Educate users about phishing and credential security to reduce the risk of account compromise. 7. Consider network segmentation and access controls to limit exposure of the WISE-DeviceOn Server to only necessary users and systems. 8. Use multi-factor authentication (MFA) to reduce the risk of unauthorized authenticated access. 9. Regularly audit and review user permissions and dashboard configurations for anomalies. 10. Engage with Advantech support for any interim security advisories or workarounds.