CVE-2025-11400 is a SQL injection vulnerability identified in version 1.0 of the SourceCodester Hotel and Lodge Management System, specifically within the /del_room.php script. The vulnerability arises due to insufficient sanitization of the 'ID' parameter, which is used to identify rooms for deletion. An attacker can remotely manipulate this parameter to inject arbitrary SQL commands, potentially allowing unauthorized access to or modification of the underlying database. The vulnerability does not require authentication or user interaction, which lowers the barrier for exploitation. The CVSS 4.0 base score is 5.3 (medium), reflecting a network attack vector with low complexity and no privileges required, but with limited impact on confidentiality, integrity, and availability. The exploit is publicly available, increasing the likelihood of exploitation attempts. While no active exploitation has been reported, the presence of publicly known exploit code elevates risk. The vulnerability could be leveraged to extract sensitive hotel data, modify or delete records, or disrupt service availability. The lack of vendor patches or official remediation guidance necessitates immediate defensive measures by users of the affected software.

For European organizations, particularly those in the hospitality industry using SourceCodester Hotel and Lodge Management System 1.0, this vulnerability poses a risk of unauthorized data access and manipulation. Potential impacts include exposure of guest personal information, reservation details, and financial data, leading to privacy violations and regulatory non-compliance under GDPR. Integrity of booking and room management data could be compromised, causing operational disruptions and reputational damage. Availability of the management system could also be affected if attackers execute destructive SQL commands. Given the hospitality sector's critical role in European economies, especially in countries with large tourism industries, exploitation could have broader economic consequences. The medium severity suggests that while the threat is significant, it may not lead to full system compromise or widespread outages without additional attack steps.

To mitigate CVE-2025-11400, organizations should immediately implement strict input validation and sanitization on the 'ID' parameter in /del_room.php. Employing parameterized queries or prepared statements will prevent SQL injection by separating code from data. Restrict database user permissions to the minimum necessary, avoiding use of high-privilege accounts for application connections. Monitor web server and database logs for suspicious activities targeting the vulnerable endpoint. If vendor patches become available, prioritize their deployment. In the absence of official patches, consider deploying Web Application Firewalls (WAFs) with rules to detect and block SQL injection attempts targeting the affected parameter. Conduct security audits and penetration testing to verify the effectiveness of mitigations. Additionally, ensure regular backups of critical data to enable recovery in case of compromise.