CVE-2025-8470 is a critical SQL Injection vulnerability identified in version 1.0 of the SourceCodester Online Hotel Reservation System. The vulnerability resides in the /admin/deleteroom.php script, specifically through improper sanitization and validation of the 'ID' parameter. An attacker can remotely manipulate this parameter to inject malicious SQL code, potentially altering the backend database queries executed by the application. This can lead to unauthorized data access, data modification, or deletion, and may allow attackers to escalate privileges or execute arbitrary commands depending on the database backend and application context. The vulnerability requires no authentication or user interaction, making it highly exploitable. Although the CVSS 4.0 score is 6.9 (medium severity), the nature of SQL injection vulnerabilities typically poses significant risks to confidentiality, integrity, and availability of data. The vulnerability has been publicly disclosed, increasing the risk of exploitation, although no known exploits in the wild have been reported yet. The absence of official patches or mitigation guidance from the vendor further exacerbates the risk for users of this system. Given that this system is used for hotel reservations, sensitive customer data such as personal identification, payment information, and booking details could be compromised if exploited.

For European organizations, particularly those in the hospitality sector using the SourceCodester Online Hotel Reservation System, this vulnerability poses a substantial risk. Exploitation could lead to unauthorized access to customer databases, resulting in data breaches that violate GDPR and other data protection regulations, potentially incurring heavy fines and reputational damage. The integrity of booking and reservation data could be compromised, disrupting business operations and customer trust. Additionally, attackers could leverage the vulnerability to pivot within the network, potentially accessing other critical systems. The remote and unauthenticated nature of the exploit increases the likelihood of attacks, especially in environments where the system is exposed to the internet without adequate network segmentation or web application firewalls. The lack of patches means organizations must rely on compensating controls, which may not fully mitigate the risk. This vulnerability also raises concerns about compliance with European cybersecurity directives such as NIS2, which mandate robust security measures for essential and important entities.

1. Immediate isolation or restriction of access to the /admin/deleteroom.php endpoint, limiting it to trusted internal IP addresses only. 2. Deployment of a Web Application Firewall (WAF) with custom rules to detect and block SQL injection patterns targeting the 'ID' parameter. 3. Conduct a thorough code review and implement parameterized queries or prepared statements in the affected script to eliminate SQL injection vectors. 4. If source code modification is not feasible immediately, implement input validation and sanitization at the web server or application layer as a temporary measure. 5. Monitor logs for suspicious activities related to the 'ID' parameter and unusual database query patterns. 6. Plan and execute an upgrade or migration to a patched or alternative hotel reservation system that addresses this vulnerability. 7. Conduct regular security assessments and penetration testing focusing on web application vulnerabilities. 8. Educate IT and security teams about this vulnerability and ensure incident response plans are updated to handle potential exploitation scenarios.