CVE-2025-6448 is a critical SQL Injection vulnerability identified in version 1.0 of the Simple Online Hotel Reservation System developed by code-projects. The vulnerability resides in the /admin/delete_room.php script, specifically in the handling of the 'room_id' parameter. An attacker can remotely manipulate this parameter without any authentication or user interaction to inject malicious SQL code. This injection can lead to unauthorized access, modification, or deletion of database records. The vulnerability affects the confidentiality, integrity, and availability of the underlying database and potentially the entire application. The CVSS 4.0 base score is 6.9 (medium severity), reflecting the ease of remote exploitation without privileges or interaction, but with limited impact on confidentiality, integrity, and availability (each rated low). No official patches or mitigations have been published yet, and no known exploits are reported in the wild, although the exploit details have been publicly disclosed, increasing the risk of exploitation. The vulnerability's presence in an administrative function suggests that successful exploitation could allow attackers to delete or manipulate room data, potentially disrupting hotel operations and customer bookings.

For European organizations, particularly those in the hospitality sector using the Simple Online Hotel Reservation System 1.0, this vulnerability poses a significant risk. Exploitation could lead to unauthorized data manipulation, including deletion of room records, causing operational disruptions and loss of customer trust. Confidential customer data stored in the database could be exposed or altered, leading to privacy violations and regulatory non-compliance under GDPR. The availability of the reservation system could be compromised, resulting in service outages and financial losses. Additionally, attackers could leverage this vulnerability as a foothold to escalate attacks within the network, potentially targeting other critical systems. Given the remote and unauthenticated nature of the exploit, the threat is particularly severe for organizations lacking robust network segmentation or web application firewalls.

1. Immediate mitigation should include restricting access to the /admin/delete_room.php endpoint by implementing IP whitelisting or VPN-only access to the administrative interface. 2. Deploy a Web Application Firewall (WAF) with custom rules to detect and block SQL injection patterns targeting the 'room_id' parameter. 3. Conduct a thorough code review and implement parameterized queries or prepared statements to sanitize all user inputs, especially in administrative scripts. 4. Monitor web server and database logs for unusual queries or repeated failed attempts targeting the vulnerable endpoint. 5. If possible, isolate the database with strict access controls and ensure backups are current to enable recovery from data manipulation. 6. Engage with the vendor or community to obtain or develop patches addressing this vulnerability. 7. Educate administrative users on the risks and enforce strong authentication mechanisms to reduce exposure of admin interfaces. 8. Consider migrating to updated or alternative hotel reservation systems with active security support.