CVE-2025-12253 identifies a SQL injection vulnerability in the AMTT Hotel Broadband Operation System version 1.0. The vulnerability is located in the /user/portal/get_expiredtime.php endpoint, where the 'uid' parameter is improperly sanitized, allowing attackers to inject malicious SQL queries. This injection flaw can be exploited remotely without any authentication or user interaction, which significantly lowers the barrier for attackers. The vulnerability has a CVSS 4.0 base score of 6.9, indicating medium severity, with network attack vector, low complexity, and no privileges or user interaction required. The impact includes potential unauthorized disclosure, modification, or deletion of data within the backend database, which could compromise guest information, billing records, or operational data. The vendor was notified but has not responded or released patches, increasing the risk of exploitation once public proof-of-concept code becomes available. Although no known exploits are currently observed in the wild, the public disclosure and lack of remediation make this a credible threat. The affected product is specialized software used in hotel broadband management, which is critical for guest internet access and operational workflows. Given the nature of the vulnerability, attackers could leverage it to pivot into broader network segments or disrupt hotel services.

For European organizations, particularly hotels and hospitality providers using the AMTT Hotel Broadband Operation System, this vulnerability poses a significant risk to data confidentiality and integrity. Exploitation could lead to unauthorized access to sensitive guest data, including personal identification and payment information, potentially violating GDPR and other privacy regulations. Data manipulation could disrupt billing and network access services, impacting customer experience and operational continuity. The availability of hotel broadband services could also be affected if attackers leverage the vulnerability to execute denial-of-service attacks or corrupt backend databases. The lack of vendor response and patches increases the window of exposure, making European hotels attractive targets for cybercriminals seeking to exploit hospitality sector weaknesses. Additionally, reputational damage and regulatory penalties could result from breaches stemming from this vulnerability.

Since no official patch or vendor response is available, European organizations should implement immediate compensating controls. These include deploying web application firewalls (WAFs) with rules specifically targeting SQL injection attempts on the /user/portal/get_expiredtime.php endpoint and the 'uid' parameter. Network segmentation should isolate the hotel broadband management system from critical internal networks to limit lateral movement. Input validation and sanitization should be enforced at the application layer if source code access or customization is possible. Continuous monitoring of logs for suspicious SQL queries or unusual database activity is essential. Organizations should also consider restricting external access to the affected system to trusted IP addresses only. Incident response plans should be updated to address potential exploitation scenarios. Finally, organizations should engage with the vendor for updates and consider alternative solutions if remediation is delayed.