CVE-2025-7764 is a critical SQL Injection vulnerability identified in version 1.0 of the code-projects Online Appointment Booking System. The flaw exists in the /admin/deletedoctorclinic.php file, specifically through the manipulation of the 'clinic' parameter. This parameter is not properly sanitized or validated, allowing an attacker to inject malicious SQL code. The vulnerability can be exploited remotely without any authentication or user interaction, making it highly accessible to attackers. Successful exploitation could allow an attacker to execute arbitrary SQL commands on the backend database, potentially leading to unauthorized data access, data modification, or deletion. The CVSS 4.0 score is 6.9 (medium severity), reflecting the lack of authentication and user interaction requirements but limited impact on confidentiality, integrity, and availability (all rated low). No known exploits are currently observed in the wild, but public disclosure increases the risk of exploitation. The vulnerability affects only version 1.0 of the product, and no official patches or mitigations have been published yet. Given the nature of the product—a system managing appointment bookings, likely containing sensitive personal and scheduling data—the risk to data confidentiality and operational integrity is significant if exploited.

For European organizations using the code-projects Online Appointment Booking System 1.0, this vulnerability poses a substantial risk. Exploitation could lead to unauthorized access to sensitive patient or client data, including personal identifiers and appointment details, violating GDPR and other data protection regulations. Data integrity could be compromised by unauthorized modifications or deletions of records, disrupting healthcare or service operations. Availability impacts are possible if attackers delete or corrupt critical data, leading to service downtime and operational disruption. The remote, unauthenticated nature of the vulnerability increases the likelihood of attacks, especially in healthcare providers, clinics, or service organizations relying on this system. Such breaches could result in reputational damage, regulatory fines, and loss of client trust. Additionally, the lack of patches means organizations must rely on compensating controls until updates are available.

1. Immediate mitigation should include restricting access to the /admin/deletedoctorclinic.php endpoint via network controls such as IP whitelisting or VPN-only access to limit exposure. 2. Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the 'clinic' parameter. 3. Conduct a thorough code review and apply input validation and parameterized queries or prepared statements to sanitize the 'clinic' parameter and other inputs. 4. Monitor logs for suspicious SQL queries or unusual activity related to the vulnerable endpoint. 5. If possible, temporarily disable the affected functionality until a vendor patch or update is released. 6. Engage with the vendor or community to obtain or develop patches addressing this vulnerability. 7. Educate administrators and developers on secure coding practices to prevent similar injection flaws. 8. Regularly back up the database and ensure backups are stored securely to enable recovery in case of data corruption or deletion.