CVE-2025-5856 is a critical SQL Injection vulnerability identified in version 1.0 of the PHPGurukul BP Monitoring Management System, specifically within the /registration.php file. The vulnerability arises due to improper sanitization or validation of the 'emailid' parameter, which is directly used in SQL queries. An attacker can remotely manipulate this parameter to inject malicious SQL code, potentially allowing unauthorized access to the underlying database. This can lead to unauthorized data disclosure, data modification, or even complete compromise of the database server. The vulnerability requires no authentication or user interaction, making it highly exploitable. Although the CVSS 4.0 score is 6.9 (medium severity), the nature of SQL injection vulnerabilities often allows attackers to escalate their privileges or pivot to other parts of the system. The exploit has been publicly disclosed, increasing the risk of exploitation by threat actors. No official patches or mitigations have been linked yet, which means affected systems remain vulnerable unless mitigations are applied manually. The vulnerability affects only version 1.0 of the product, which is a specialized BP (blood pressure) monitoring management system developed by PHPGurukul, likely used in healthcare environments to manage patient data and monitoring records.

For European organizations, especially healthcare providers and clinics using the PHPGurukul BP Monitoring Management System, this vulnerability poses a significant risk. Exploitation could lead to unauthorized access to sensitive patient health information, violating GDPR and other data protection regulations. Data integrity could be compromised, leading to incorrect patient records and potentially harmful medical decisions. Availability of the system could also be affected if attackers execute destructive SQL commands or cause database corruption. The breach of confidentiality and integrity in healthcare systems can result in severe reputational damage, legal penalties, and loss of patient trust. Given the critical nature of healthcare data and the regulatory environment in Europe, the impact extends beyond technical damage to include compliance and operational risks.

Organizations should immediately audit their use of the PHPGurukul BP Monitoring Management System version 1.0 and identify any deployments. Since no official patch is currently available, immediate mitigation steps include implementing web application firewalls (WAFs) with SQL injection detection and prevention rules tailored to monitor and block suspicious 'emailid' parameter inputs. Input validation and sanitization should be enforced at the application level, ideally by modifying the source code to use parameterized queries or prepared statements instead of directly embedding user input in SQL commands. Network segmentation and strict access controls should be applied to limit exposure of the vulnerable system to only trusted internal networks. Regular database backups should be maintained to enable recovery in case of data corruption. Organizations should also monitor logs for unusual query patterns or errors indicative of SQL injection attempts. Finally, they should engage with PHPGurukul or the software vendor for updates or patches and plan for an upgrade or replacement of the vulnerable system.