CVE-2025-4360 is a SQL Injection vulnerability identified in version 1.0 of the itsourcecode Gym Management System, specifically within the /view_member.php file. The vulnerability arises from improper sanitization or validation of the 'ID' parameter, which is used in SQL queries. An attacker can remotely manipulate this parameter to inject malicious SQL code, potentially allowing unauthorized access to the backend database. This can lead to unauthorized data disclosure, data modification, or even deletion of records. The vulnerability does not require authentication or user interaction, making it exploitable remotely by any attacker with network access to the affected system. The CVSS 4.0 base score is 6.9, indicating a medium severity level, reflecting the ease of exploitation (network accessible, no privileges or user interaction required) but limited impact on confidentiality, integrity, and availability (each rated low). No known exploits are currently reported in the wild, and no patches have been published yet. The vulnerability is critical in nature due to the potential for SQL injection but is rated medium severity overall because of limited impact scope and lack of known active exploitation. This vulnerability highlights the importance of input validation and parameterized queries in web applications managing sensitive personal and membership data.

For European organizations using the itsourcecode Gym Management System 1.0, this vulnerability poses a significant risk to the confidentiality and integrity of member data, including personal information and potentially payment details. Exploitation could lead to unauthorized data access, data corruption, or deletion, disrupting business operations and damaging customer trust. Given the remote exploitability without authentication, attackers could leverage this vulnerability to compromise multiple gym management systems across Europe. This could result in regulatory non-compliance issues under GDPR due to data breaches, leading to financial penalties and reputational damage. Additionally, compromised systems could be used as pivot points for further attacks within organizational networks. The impact is particularly critical for organizations with large member databases or those integrated with other internal systems, increasing the potential scope of damage.

Immediate mitigation should focus on input validation and sanitization of the 'ID' parameter in /view_member.php. Developers should implement parameterized queries or prepared statements to prevent SQL injection. Until a vendor patch is available, organizations should consider deploying Web Application Firewalls (WAFs) with rules to detect and block SQL injection attempts targeting this endpoint. Network segmentation can limit exposure of the Gym Management System to only trusted internal networks or VPN users. Regular monitoring of logs for suspicious query patterns related to the 'ID' parameter is advised. Organizations should also conduct code reviews and penetration testing focused on SQL injection vulnerabilities in all user input fields. Finally, organizations should engage with the vendor for timely patch releases and apply updates as soon as they become available.