CVE-2025-11591 identifies a SQL injection vulnerability in CodeAstro Gym Management System version 1.0, specifically within the /admin/actions/delete-member.php endpoint. The vulnerability occurs due to insufficient input validation on the 'ID' parameter, which is used in SQL queries to delete member records. Because the parameter is not properly sanitized, an attacker can craft malicious input to manipulate the SQL query logic, potentially extracting, modifying, or deleting data from the backend database. The attack vector is remote and does not require user interaction or prior authentication, increasing the risk profile. The CVSS 4.0 score of 5.3 reflects a medium severity, considering the low complexity of attack and no privileges required, but limited impact on confidentiality, integrity, and availability. No patches or fixes have been published yet, and no known exploits are reported in the wild, but public disclosure means threat actors could develop exploits. The vulnerability affects only version 1.0 of the product, which is used primarily by gym and fitness centers for member management. Exploitation could lead to unauthorized data access, data corruption, or denial of service by deleting or altering member records. The lack of scope change means the impact is confined to the vulnerable application and its database. This vulnerability highlights the importance of secure coding practices, especially input validation and use of parameterized queries in web applications handling sensitive personal data.

For European organizations using CodeAstro Gym Management System 1.0, this vulnerability poses a risk of unauthorized access to sensitive member data, including personal and possibly payment information. Exploitation could lead to data breaches, violating GDPR requirements and resulting in regulatory penalties and reputational damage. Integrity of member records could be compromised, affecting business operations and trust. Availability could be impacted if attackers delete or corrupt data, disrupting gym management activities. Given the fitness industry's growth in Europe and the increasing reliance on digital management systems, such vulnerabilities can have significant operational and financial consequences. Additionally, attackers could leverage this vulnerability as a foothold for further network intrusion if the system is connected to broader organizational infrastructure. The medium severity rating suggests moderate risk, but the ease of exploitation and lack of authentication requirement elevate the urgency for mitigation.

1. Immediately restrict access to the /admin/actions/delete-member.php endpoint by IP whitelisting or VPN-only access to reduce exposure. 2. Implement strict input validation and sanitization on the 'ID' parameter to ensure only valid numeric or expected formats are accepted. 3. Refactor the code to use parameterized queries or prepared statements to prevent SQL injection attacks. 4. Conduct a comprehensive security audit of the entire CodeAstro Gym Management System to identify and remediate similar vulnerabilities. 5. Monitor logs for suspicious activity targeting the delete-member functionality and set up alerts for anomalous SQL errors or injection patterns. 6. Engage with the vendor for patches or updates and apply them promptly once available. 7. Educate system administrators and developers on secure coding practices and the risks of SQL injection. 8. Consider deploying Web Application Firewalls (WAF) with SQL injection detection rules as an interim protective measure. 9. Backup critical data regularly and ensure recovery procedures are tested to mitigate data loss impact.