CVE-2025-7765 is a SQL Injection vulnerability identified in version 1.0 of the code-projects Online Appointment Booking System, specifically within the /admin/addmanagerclinic.php file. The vulnerability arises from improper sanitization or validation of the 'clinic' parameter, which is susceptible to malicious input manipulation. An attacker can exploit this flaw remotely without requiring authentication or user interaction, by injecting crafted SQL commands through the vulnerable parameter. This can lead to unauthorized access to the backend database, allowing attackers to read, modify, or delete sensitive data related to appointments, user credentials, or administrative information. The vulnerability has a CVSS 4.0 base score of 6.9, indicating a medium severity level, primarily due to the limited impact on confidentiality, integrity, and availability (each rated low), but with ease of exploitation (no privileges or user interaction required). Although no public exploits are currently known in the wild, the disclosure of the vulnerability increases the risk of exploitation. The lack of available patches or mitigations from the vendor further exacerbates the threat landscape for users of this system. Given the critical role of appointment booking systems in healthcare and service industries, exploitation could disrupt operations and compromise sensitive personal data.

For European organizations, particularly those in healthcare, wellness, or service sectors relying on the code-projects Online Appointment Booking System, this vulnerability poses significant risks. Exploitation could lead to unauthorized data disclosure, including personal health information or client details, violating GDPR and other data protection regulations. Integrity breaches could result in altered appointment data, causing operational disruptions and loss of trust. Availability impacts, while rated low, could still affect service continuity if attackers manipulate or delete critical records. The remote and unauthenticated nature of the exploit increases the attack surface, making it easier for threat actors to target organizations without insider access. This could lead to regulatory penalties, reputational damage, and financial losses. Organizations using this vulnerable software must consider the potential for targeted attacks, especially as the exploit details are publicly available, increasing the likelihood of automated scanning and exploitation attempts.

Immediate mitigation steps include isolating the affected system from public networks to reduce exposure. Organizations should implement Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection patterns targeting the 'clinic' parameter in /admin/addmanagerclinic.php. Input validation and parameterized queries should be enforced at the application level; if source code access is available, developers must sanitize inputs and use prepared statements to prevent injection. In the absence of vendor patches, consider migrating to alternative appointment booking solutions with robust security postures. Regularly monitor logs for suspicious database queries or anomalies. Conduct penetration testing focused on injection flaws to identify other potential vulnerabilities. Additionally, enforce strict access controls and network segmentation to limit lateral movement if compromise occurs. Organizations should also prepare incident response plans specific to data breaches involving appointment systems.