CVE-2025-5707 is a critical SQL Injection vulnerability identified in version 1.0 of the PHPGurukul Human Metapneumovirus Testing Management System, specifically affecting the /registered-user-testing.php file. The vulnerability arises from improper sanitization or validation of the 'testtype' parameter, which can be manipulated by an attacker to inject malicious SQL code. This flaw allows remote attackers to execute arbitrary SQL commands on the backend database without requiring authentication or user interaction. The injection can lead to unauthorized data access, data modification, or even complete compromise of the database server. Although the CVSS 4.0 score is 6.9 (medium severity), the potential impact is significant due to the nature of the data handled by the system, which likely includes sensitive patient testing information. The vulnerability may also affect other parameters, increasing the attack surface. No patches or fixes have been publicly disclosed yet, and no known exploits are currently reported in the wild, but the exploit details have been made public, increasing the risk of exploitation by threat actors.

For European organizations, especially healthcare providers and laboratories using the PHPGurukul Human Metapneumovirus Testing Management System, this vulnerability poses a substantial risk. Exploitation could lead to unauthorized disclosure of sensitive patient health data, violating GDPR and other data protection regulations, resulting in legal penalties and reputational damage. Integrity of test results could be compromised, potentially affecting patient care and public health responses. Availability of the system might also be impacted if attackers perform destructive SQL operations or cause database corruption. Given the critical nature of healthcare data and the importance of accurate testing during respiratory virus outbreaks, the impact on European healthcare infrastructure could be severe, disrupting diagnostic workflows and eroding trust in digital health systems.

Immediate mitigation steps include implementing input validation and parameterized queries or prepared statements to prevent SQL injection. Organizations should conduct a thorough code review of all input handling in the affected application, especially focusing on the 'testtype' parameter and other user-supplied inputs. Deploying Web Application Firewalls (WAFs) with SQL injection detection rules can provide a temporary protective layer. Monitoring database logs for unusual queries or access patterns is recommended to detect exploitation attempts. Since no official patch is available, organizations should consider isolating the affected system from external networks or restricting access to trusted users only. Additionally, regular backups of the database should be maintained to enable recovery in case of data corruption or loss. Coordination with PHPGurukul for an official patch or update is critical, and organizations should prioritize upgrading once a fix is released.