CVE-2025-12253 identifies a SQL injection vulnerability in AMTT Hotel Broadband Operation System version 1.0, specifically targeting the /user/portal/get_expiredtime.php script. The vulnerability arises from improper sanitization of the uid parameter, allowing attackers to inject malicious SQL queries remotely without requiring authentication or user interaction. This flaw enables attackers to manipulate backend database queries, potentially leading to unauthorized data disclosure, data modification, or even complete compromise of the database. The vulnerability has been publicly disclosed, but the vendor has not responded or provided patches, increasing the risk of exploitation. The CVSS 4.0 score of 6.9 reflects a medium severity, considering the vulnerability’s remote exploitability and lack of authentication requirements, but limited impact on system control and scope. No known exploits have been detected in the wild yet, but the public disclosure and absence of vendor mitigation elevate the threat level. The affected product is primarily used in hotel broadband management, which is critical for guest internet access and operational services in hospitality environments. The lack of patch availability necessitates alternative mitigation strategies such as network segmentation, web application firewalls, and strict input validation. Given the nature of SQL injection, attackers could exfiltrate sensitive customer data, disrupt service availability, or pivot to further internal network compromise.

For European organizations, particularly those in the hospitality sector using AMTT Hotel Broadband Operation System 1.0, this vulnerability poses significant risks. Exploitation could lead to unauthorized access to customer data, including personal and payment information, undermining GDPR compliance and exposing organizations to regulatory penalties. Data integrity could be compromised, affecting billing, user authentication, and service availability, potentially disrupting hotel operations and guest services. The remote and unauthenticated nature of the attack vector increases the likelihood of exploitation by cybercriminals or state-sponsored actors targeting tourism infrastructure. Additionally, compromised broadband systems could serve as pivot points for broader network intrusions, threatening internal corporate networks and other connected systems. The reputational damage from a breach in this sector can be substantial, impacting customer trust and business continuity. The absence of vendor patches further exacerbates the risk, requiring organizations to implement compensating controls promptly.

Given the lack of official patches, European organizations should implement immediate compensatory controls. First, restrict external access to the vulnerable endpoint via network segmentation and firewall rules, allowing only trusted internal or management IPs to communicate with the /user/portal/get_expiredtime.php resource. Deploy Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection payloads targeting the uid parameter. Conduct thorough input validation and sanitization on all user-supplied data at the application layer, if source code access or customization is possible. Monitor logs for unusual database query patterns or repeated access attempts to the vulnerable endpoint. Consider deploying intrusion detection/prevention systems (IDS/IPS) tuned for SQL injection signatures. Engage with the vendor for updates and consider alternative broadband management solutions if remediation is delayed. Regularly back up critical data and test restoration procedures to mitigate potential data loss. Finally, raise awareness among IT and security teams about this vulnerability to ensure rapid incident response if exploitation attempts are detected.