Overview
CVE-2025-34258 describes a stored cross-site scripting (XSS) vulnerability found in Advantech WISE-DeviceOn Server versions prior to 5.4. This vulnerability allows an authenticated attacker to inject malicious JavaScript code into the application, which can then be executed in the browser of other users, potentially leading to session hijacking, data theft, and other malicious activities. This poses a significant risk to organizations using the affected software.
Technical Details
The vulnerability exists in the /rmm/v1/devicemap/plan endpoint. When an authenticated user adds an area to a map entry, the name parameter is stored without proper HTML sanitization. This allows an attacker to insert arbitrary HTML and JavaScript code into the name field. When another user views or interacts with the affected map entry, the malicious script is rendered in their browser, executing the attacker’s code within the context of the user’s session.
Specifically:
- Affected Endpoint:
/rmm/v1/devicemap/plan - Vulnerable Parameter:
name(when adding an area to a map entry) - Vulnerability Type: Stored Cross-Site Scripting (XSS)
CVSS Analysis
The CVE details currently mark both severity and CVSS score as N/A. However, given the nature of stored XSS and the potential for significant impact, it’s likely that a CVSS score will be assigned upon further analysis. A high CVSS score should be anticipated due to the potential for privilege escalation and data compromise.
Possible Impact
Successful exploitation of this vulnerability could have severe consequences, including:
- Session Hijacking: An attacker could steal a user’s session cookies and impersonate them.
- Data Theft: Sensitive data displayed within the application could be stolen.
- Account Takeover: An attacker could potentially take over user accounts.
- Malware Distribution: The injected script could be used to redirect users to malicious websites or download malware.
- Defacement: The attacker could alter the appearance of the application, causing reputational damage.
Mitigation or Patch Steps
The recommended mitigation is to upgrade Advantech WISE-DeviceOn Server to version 5.4 or later. Advantech has released a patch to address this vulnerability. If upgrading is not immediately possible, consider the following temporary mitigations:
- Input Validation: Implement strict input validation and sanitization on the
nameparameter in the/rmm/v1/devicemap/planendpoint. Escape any special characters before storing the data in the database. - Output Encoding: Ensure that all data retrieved from the database and displayed in the map list is properly encoded to prevent XSS attacks.
- Web Application Firewall (WAF): Deploy a WAF and configure it to block requests containing potentially malicious JavaScript code.
