CVE-2025-63229 is a reflected Cross-Site Scripting (XSS) vulnerability identified in the Mozart FM Transmitter's web management interface version WEBMOZZI-00287. The vulnerability resides in the /main0.php endpoint, where the ?m= query parameter fails to properly sanitize user input, allowing an attacker to inject malicious JavaScript code. When a victim accesses a crafted URL containing the malicious payload, the script executes in their browser context. This can lead to theft of sensitive data such as authentication tokens, session cookies, or other confidential information accessible via the browser. Additionally, attackers may perform unauthorized actions on behalf of the user, including changing device settings or escalating privileges within the management interface. The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). The CVSS 3.1 base score is 5.4, reflecting medium severity due to network attack vector, low attack complexity, no privileges required, but requiring user interaction. No patches or known exploits are currently reported, indicating a window for proactive mitigation. The vulnerability's impact is limited to confidentiality and integrity, with no direct availability impact. Given the device's role in managing FM transmitters, exploitation could disrupt broadcast management or leak operational details.

For European organizations, particularly broadcasters and media companies relying on Mozart FM Transmitters, this vulnerability poses a risk of unauthorized access to management interfaces. Successful exploitation could lead to session hijacking and unauthorized configuration changes, potentially disrupting broadcast operations or leaking sensitive operational data. The confidentiality of user credentials and session tokens is at risk, which could cascade into broader network compromise if attackers leverage stolen credentials. While the vulnerability does not directly impact availability, indirect effects such as misconfiguration or sabotage could affect service continuity. The risk is heightened in environments where the management interface is exposed to untrusted networks or insufficiently segmented. Given the medium severity and requirement for user interaction, targeted phishing or social engineering campaigns could be used to exploit this vulnerability. European organizations with regulatory obligations around data protection (e.g., GDPR) must consider the potential data leakage implications.

To mitigate CVE-2025-63229, organizations should implement strict input validation and output encoding on the ?m= query parameter to neutralize malicious scripts. If vendor patches become available, immediate application is critical. Until then, restrict access to the web management interface to trusted internal networks using network segmentation, VPNs, or firewall rules. Employ web application firewalls (WAFs) with custom rules to detect and block XSS payloads targeting the /main0.php endpoint. Educate users and administrators about the risks of clicking untrusted links and encourage cautious behavior. Regularly monitor logs for suspicious access patterns or repeated attempts to exploit the vulnerability. Consider deploying browser security features such as Content Security Policy (CSP) to limit script execution. Finally, review and harden authentication mechanisms to reduce the impact of session hijacking.