CVE-2025-13267 is a SQL Injection vulnerability identified in version 1.0 of the SourceCodester Dental Clinic Appointment Reservation System, specifically within the /success.php script. The vulnerability arises from improper sanitization of user-supplied input parameters, namely username and password, allowing an attacker to inject malicious SQL code. This injection flaw can be exploited remotely without requiring authentication or user interaction, making it relatively easy to exploit. The vulnerability impacts the confidentiality, integrity, and availability of the underlying database by potentially allowing unauthorized data access, modification, or deletion. The CVSS 4.0 base score is 5.3 (medium), reflecting the moderate impact and ease of exploitation. Although no known exploits are currently active in the wild, the public disclosure of exploit code increases the likelihood of attacks. The affected product is a niche appointment reservation system used in dental clinics, which may store sensitive patient information and appointment data. The lack of official patches or updates necessitates that organizations implement compensating controls such as input validation, web application firewalls, and monitoring. The vulnerability highlights the importance of secure coding practices, especially in healthcare applications where data sensitivity is high. Given the remote attack vector and no requirement for authentication, this vulnerability could be leveraged by attackers to gain unauthorized access to patient records or disrupt clinic operations.

For European organizations, particularly dental clinics and healthcare providers using the SourceCodester Dental Clinic Appointment Reservation System, this vulnerability poses a risk of unauthorized access to sensitive patient data, including personal and appointment information. Exploitation could lead to data breaches violating GDPR requirements, resulting in legal and financial penalties. Additionally, attackers could alter or delete appointment data, disrupting clinic operations and patient care. The medium severity indicates that while the impact is significant, it may not lead to full system compromise without additional vulnerabilities. However, the ease of remote exploitation without authentication increases the threat level. Healthcare providers in Europe are increasingly targeted by cybercriminals due to the value of health data and critical nature of services, making this vulnerability a potential entry point for broader attacks. The lack of patches means organizations must act quickly to mitigate risks. Failure to address this vulnerability could damage organizational reputation and patient trust, especially in countries with strict data protection laws.

1. Implement immediate input validation and sanitization on the username and password parameters in /success.php to prevent SQL injection. 2. Refactor the application code to use parameterized queries or prepared statements instead of concatenating user inputs into SQL commands. 3. Deploy a Web Application Firewall (WAF) configured to detect and block SQL injection attempts targeting the vulnerable endpoint. 4. Monitor application logs and network traffic for unusual or suspicious activity related to the /success.php script. 5. If possible, isolate the affected system from critical networks until a secure version or patch is available. 6. Conduct a thorough security audit of the entire application to identify and remediate other potential injection points. 7. Educate development teams on secure coding practices and the importance of input validation. 8. Engage with the vendor or community to obtain or develop official patches or updates. 9. Backup critical data regularly and ensure recovery procedures are tested to minimize impact in case of exploitation. 10. Consider replacing the vulnerable system with a more secure, actively maintained appointment management solution if remediation is not feasible.