CVE-2025-15505 is a cross-site scripting vulnerability identified in the Luxul XWR-600 wireless router firmware versions 4.0.0 and 4.0.1. The vulnerability resides in the Web Administration Interface, where the Guest Network or Wireless Profile SSID parameter is not properly sanitized, allowing an attacker to inject malicious scripts. This flaw can be exploited remotely over the network without prior authentication, although the attacker requires user interaction to trigger the malicious payload, such as convincing an administrator to visit a crafted URL or interact with a manipulated interface element. The vulnerability could enable attackers to execute arbitrary JavaScript in the context of the router’s admin interface, potentially leading to session hijacking, credential theft, or unauthorized configuration changes. Despite the vendor being contacted early, no patch or technical statement has been released, leaving affected devices exposed. The CVSS 4.8 score reflects a medium severity level, factoring in the remote attack vector but requiring privileges and user interaction. No confirmed exploitation in the wild has been reported, but public exploit code availability increases the risk of future attacks. The lack of vendor response and patch availability underscores the importance of proactive mitigation by users and administrators.

For European organizations, this vulnerability could compromise the security of network infrastructure relying on Luxul XWR-600 devices. Successful exploitation may allow attackers to hijack administrative sessions or inject malicious scripts, potentially leading to unauthorized network configuration changes or exposure of sensitive network information. This could degrade network integrity and availability, impacting business operations. Since the attack can be launched remotely without authentication, organizations with exposed management interfaces are at higher risk. However, the requirement for user interaction and administrative privileges limits the scope somewhat. Still, in environments where these routers manage guest wireless networks, attackers could leverage this vulnerability to pivot into internal networks or conduct further attacks. The absence of vendor patches increases the urgency for European entities to implement compensating controls to protect their networks.

European organizations should immediately restrict access to the Luxul XWR-600 Web Administration Interface by limiting it to trusted internal networks and using VPNs for remote management. Disable guest network SSID configuration via the web interface if possible, or sanitize inputs manually if the interface allows. Employ network segmentation to isolate guest wireless networks from critical infrastructure. Monitor network traffic for suspicious activity indicative of XSS exploitation attempts. Since no official patch is available, consider replacing affected devices with updated hardware or firmware from vendors with active security support. Educate network administrators about the risk of phishing or social engineering attacks that could trigger the required user interaction. Regularly audit router configurations and logs for anomalies. Finally, maintain up-to-date backups of router configurations to enable rapid recovery if compromise occurs.