CVE-2025-11399 is a SQL injection vulnerability identified in SourceCodester Hotel and Lodge Management System version 1.0, specifically affecting the /pages/save_room.php script. The vulnerability arises from insufficient input validation on the 'floorno' parameter, which allows an attacker to inject arbitrary SQL commands remotely without requiring user interaction or elevated privileges beyond low-level access. This flaw can be exploited to manipulate backend database queries, potentially leading to unauthorized data access, data modification, or disruption of service. The vulnerability's CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P) indicates network attack vector, low attack complexity, no user interaction, and partial impacts on confidentiality, integrity, and availability. Although no known exploits are currently active in the wild, the public disclosure of exploit code increases the likelihood of exploitation attempts. The affected product is commonly used in hospitality management, which often handles sensitive customer and booking data, making the vulnerability a significant concern for data protection and operational continuity. The absence of official patches necessitates immediate mitigation through secure coding practices and input sanitization.

For European organizations, particularly those in the hospitality sector using SourceCodester Hotel and Lodge Management System 1.0, this vulnerability poses risks of unauthorized access to sensitive customer data, including personal and booking information. Exploitation could lead to data breaches, undermining customer trust and potentially violating GDPR regulations. Additionally, attackers could alter or delete booking records, causing operational disruptions and financial losses. The partial compromise of system integrity and availability may affect service reliability, impacting business continuity. Given the public availability of exploit code, the threat landscape is heightened, increasing the urgency for European entities to address this vulnerability promptly. Organizations with interconnected systems may also face lateral movement risks if attackers leverage this vulnerability as an entry point.

1. Immediately audit all instances of SourceCodester Hotel and Lodge Management System version 1.0 to identify affected deployments. 2. Implement strict input validation and sanitization on the 'floorno' parameter and any other user-supplied inputs, preferably using parameterized queries or prepared statements to prevent SQL injection. 3. If available, apply official patches or updates from the vendor; if not, consider upgrading to a more secure or supported management system. 4. Employ web application firewalls (WAFs) configured to detect and block SQL injection attempts targeting the vulnerable endpoint. 5. Conduct regular security assessments and penetration testing focusing on injection flaws. 6. Monitor logs for suspicious database query patterns or repeated access attempts to /pages/save_room.php. 7. Educate development and IT teams on secure coding practices and the importance of input validation. 8. Isolate the affected system within the network to limit potential lateral movement until remediation is complete.