CVE-2025-11591 identifies a SQL injection vulnerability in CodeAstro Gym Management System version 1.0, located in the /admin/actions/delete-member.php script. The vulnerability stems from inadequate input validation of the 'ID' parameter, which is used in SQL queries to delete member records. Because the parameter is not properly sanitized, an attacker can inject malicious SQL code remotely without requiring authentication or user interaction. This can lead to unauthorized database queries, potentially allowing attackers to read, modify, or delete sensitive data stored in the backend database. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity, with an attack vector of network (remote), low attack complexity, no privileges required, and no user interaction needed. The impact on confidentiality, integrity, and availability is low to limited but still significant for the affected systems. No known exploits are currently reported in the wild, but public disclosure increases the risk of exploitation attempts. The vulnerability affects only version 1.0 of the product, and no official patches have been linked yet. The threat is particularly relevant for organizations exposing the admin interface to the internet or lacking proper network segmentation and access controls. Attackers exploiting this vulnerability could manipulate membership data, potentially causing operational disruptions or data breaches. Given the nature of gym management systems, personal data of members could be exposed, raising privacy concerns under GDPR for European entities.

For European organizations, especially small and medium-sized enterprises operating gyms or fitness centers using CodeAstro Gym Management System 1.0, this vulnerability poses a risk of unauthorized data access and manipulation. Exploitation could lead to exposure of personal member information, violating GDPR requirements and resulting in legal and financial penalties. Integrity of membership records could be compromised, affecting business operations such as billing, scheduling, and membership management. Availability of the system might be impacted if attackers delete or corrupt data, causing service disruptions. The medium severity score reflects a moderate risk, but the lack of authentication and user interaction requirements increases the likelihood of exploitation. Organizations with internet-facing admin portals are particularly vulnerable. Additionally, reputational damage could arise from data breaches or service outages. The vulnerability could also be leveraged as a foothold for further attacks within the network if the gym management system is integrated with other internal systems.

1. Immediate code review and remediation to implement proper input validation and parameterized queries or prepared statements in the /admin/actions/delete-member.php script to prevent SQL injection. 2. Restrict access to the admin interface by implementing network-level controls such as VPNs, IP whitelisting, or firewall rules to limit exposure to trusted personnel only. 3. Monitor database logs and application logs for unusual or suspicious queries that could indicate exploitation attempts. 4. Conduct a thorough security assessment of the entire gym management system to identify and remediate any additional vulnerabilities. 5. Implement web application firewalls (WAF) with SQL injection detection and prevention capabilities to provide an additional layer of defense. 6. Educate system administrators and staff about the risks and signs of exploitation attempts. 7. Regularly back up databases and test restoration procedures to minimize impact in case of data corruption or deletion. 8. Engage with the vendor or community to obtain patches or updates as they become available and apply them promptly. 9. Consider isolating the gym management system from critical internal networks to limit lateral movement if compromised.