CVE-2025-6339 is a critical SQL Injection vulnerability identified in version 1.0 of the ponaravindb Hospital Management System (HMS). The flaw exists in an unspecified functionality within the /func3.php file, specifically through the manipulation of the 'username1' parameter. This vulnerability allows an unauthenticated remote attacker to inject malicious SQL queries directly into the backend database. The injection occurs without requiring any user interaction or privileges, making exploitation straightforward. The CVSS 4.0 base score is 6.9 (medium severity), reflecting the potential for partial compromise of confidentiality, integrity, and availability of the system. The vulnerability does not require authentication (PR:N), has low attack complexity (AC:L), and no user interaction (UI:N). The impact on confidentiality, integrity, and availability is rated as low individually, but collectively they pose a significant risk given the sensitive nature of hospital management systems. Although no public exploits are currently known in the wild, the vulnerability has been publicly disclosed, increasing the risk of exploitation. Hospital Management Systems typically store sensitive patient data, appointment schedules, billing information, and medical records, making them high-value targets for attackers seeking to exfiltrate data, disrupt hospital operations, or conduct ransomware attacks. The lack of patches or mitigation links indicates that the vendor has not yet released an official fix, necessitating immediate defensive measures by affected organizations.

For European healthcare organizations using ponaravindb Hospital Management System 1.0, this vulnerability poses a significant threat to patient data confidentiality and system integrity. Exploitation could lead to unauthorized access to sensitive medical records, manipulation of patient information, or disruption of hospital operations. This could result in regulatory non-compliance with GDPR due to data breaches, financial penalties, reputational damage, and potential harm to patient safety. The ability to remotely exploit the vulnerability without authentication increases the risk of widespread attacks, potentially affecting multiple hospitals or clinics using this software. Given the critical role of hospital management systems in healthcare delivery, successful exploitation could also disrupt critical healthcare services, impacting patient care and emergency response capabilities.

1. Immediate network-level controls: Restrict external access to the ponaravindb HMS web interface, especially the /func3.php endpoint, using firewalls or VPNs to limit exposure to trusted internal networks only. 2. Input validation and web application firewall (WAF): Deploy a WAF with custom rules to detect and block SQL injection attempts targeting the 'username1' parameter. 3. Code review and temporary patching: If source code access is available, implement parameterized queries or prepared statements around the vulnerable input to prevent injection. 4. Monitoring and logging: Enable detailed logging of web requests to /func3.php and monitor for suspicious activity patterns indicative of SQL injection attempts. 5. Vendor engagement: Urge the vendor to release an official patch and apply it promptly once available. 6. Incident response readiness: Prepare for potential breach scenarios by backing up critical data securely and developing a response plan for data compromise or service disruption. 7. Segmentation: Isolate the HMS system from other critical network segments to limit lateral movement if compromised.