CVE-2025-4465 is a SQL Injection vulnerability identified in version 1.0 of the itsourcecode Gym Management System. The vulnerability exists in the /ajax.php endpoint, specifically when handling the 'member_id' parameter in the 'save_schedule' action. An attacker can manipulate this parameter to inject malicious SQL code, which the backend database executes. This flaw allows remote attackers to execute unauthorized SQL commands without any authentication or user interaction, potentially leading to unauthorized data access, data modification, or disruption of the database's integrity and availability. The vulnerability is classified as medium severity with a CVSS 4.0 score of 6.9, reflecting its ease of exploitation (no privileges or user interaction required) but limited impact scope due to the affected functionality and data confidentiality/integrity/availability impact being low to medium. Although no public exploits are currently known in the wild, the vulnerability details have been disclosed publicly, increasing the risk of exploitation by opportunistic attackers. The lack of available patches or mitigations from the vendor further elevates the risk for organizations using this system. Given that gym management systems often store sensitive personal and membership data, exploitation could lead to leakage of member information, unauthorized schedule changes, or denial of service to legitimate users.

For European organizations operating gyms or fitness centers using the itsourcecode Gym Management System 1.0, this vulnerability poses a risk to the confidentiality and integrity of member data and scheduling information. Exploitation could result in unauthorized disclosure of personal data, violating GDPR requirements and leading to regulatory penalties. Additionally, attackers could alter schedules or disrupt system availability, impacting business operations and customer trust. The remote and unauthenticated nature of the vulnerability increases the likelihood of attacks, especially from opportunistic threat actors. Organizations could face reputational damage, financial losses from operational disruption, and potential legal consequences due to data breaches. The impact is particularly significant for larger gym chains or those with extensive member databases in Europe, where data protection laws are stringent.

Organizations should immediately audit their use of the itsourcecode Gym Management System and identify any deployments of version 1.0. Since no official patches are currently available, mitigation should focus on implementing web application firewalls (WAFs) with SQL injection detection and prevention rules tailored to the vulnerable endpoint and parameter. Input validation and sanitization should be enforced at the application level to reject or properly escape malicious input in the 'member_id' parameter. Network segmentation and access controls should limit exposure of the vulnerable system to untrusted networks. Monitoring and logging of database queries and application logs should be enhanced to detect anomalous activities indicative of SQL injection attempts. If feasible, organizations should consider upgrading to a newer, patched version of the software or migrating to alternative gym management solutions with better security postures. Additionally, organizations must review and reinforce their incident response plans to quickly address any exploitation attempts.