CVE-2025-15505 is a cross-site scripting vulnerability identified in the Luxul XWR-600 wireless router's web administration interface, specifically related to the Guest Network/Wireless Profile SSID parameter. The vulnerability exists due to insufficient input validation and sanitization of this parameter, which allows an authenticated attacker to inject malicious JavaScript code. The attack vector is remote network access to the router's administrative interface, requiring high privileges (authentication) but no special conditions beyond user interaction to trigger the malicious payload. The vulnerability has a CVSS 4.0 base score of 4.8, indicating medium severity, with the vector string showing network attack vector, low attack complexity, no privileges required for attack initiation, but user interaction is necessary. The impact primarily affects confidentiality and integrity by enabling session hijacking, credential theft, or manipulation of the router's web interface. The vendor, Luxul, has not provided a patch or technical statement, and no known exploits in the wild have been reported yet, though proof-of-concept code is publicly available. This vulnerability highlights the risks associated with web interface input handling in network devices, especially those managing guest wireless profiles, which are often less strictly controlled. Organizations using affected firmware versions (4.0.0 and 4.0.1) should consider this vulnerability a moderate risk until a patch is released.

For European organizations, the impact of CVE-2025-15505 could include unauthorized access to router administrative sessions, leading to potential compromise of network configurations and exposure of sensitive network information. Attackers exploiting this XSS vulnerability could hijack sessions of network administrators or guests, potentially gaining further access to internal networks or launching additional attacks such as phishing or malware distribution. This is particularly concerning for sectors relying on guest wireless access, such as hospitality, education, and public venues. The vulnerability could disrupt network availability if attackers manipulate router settings or cause denial of service through crafted payloads. Although the vulnerability requires authentication and user interaction, the remote attack vector increases the risk surface, especially in environments where administrative interfaces are exposed or weakly protected. The absence of a vendor patch increases the window of exposure, necessitating proactive mitigation. Overall, the threat could undermine network security posture and trust in wireless infrastructure within European enterprises and public institutions.

1. Immediately restrict access to the Luxul XWR-600 web administration interface by limiting it to trusted management networks or VPNs, preventing exposure to untrusted networks. 2. Enforce strong authentication mechanisms for router administration, including complex passwords and, if supported, multi-factor authentication. 3. Disable or restrict guest network management features if not required, minimizing the attack surface related to the vulnerable SSID parameter. 4. Implement network segmentation to isolate guest wireless networks from critical internal resources, reducing potential lateral movement if exploitation occurs. 5. Monitor router logs and network traffic for unusual activity indicative of attempted XSS exploitation or unauthorized access. 6. Regularly audit and sanitize all input fields in the router’s web interface, if custom firmware or management tools are used. 7. Engage with Luxul support channels to request timely patches or firmware updates addressing this vulnerability. 8. Consider deploying web application firewalls or intrusion detection systems capable of detecting and blocking XSS payloads targeting network devices. 9. Educate network administrators and users about the risks of interacting with suspicious links or scripts in the context of router management interfaces. 10. Plan for firmware upgrades or device replacement if no vendor patch becomes available within a reasonable timeframe.