CVE-2025-57147 is a high-severity SQL Injection vulnerability identified in the phpgurukul Complaint Management System version 2.0. The root cause of this vulnerability lies in insufficient input validation for multiple user-supplied parameters, specifically 'fullname', 'email', and 'contactno' within the user/registration.php script. Because these parameters are not properly sanitized or validated, an attacker can inject malicious SQL code into the backend database queries. This vulnerability is exploitable remotely over the network without requiring any authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). The impact of successful exploitation primarily affects confidentiality, allowing attackers to extract sensitive data from the database. However, integrity and availability impacts are not indicated. The vulnerability is classified under CWE-89, which corresponds to SQL Injection flaws. Although no known exploits are currently reported in the wild, the ease of exploitation and the critical nature of data exposure make this a significant threat. The lack of available patches or fixes at the time of publication further increases the risk for organizations using this system. Given that the Complaint Management System likely handles sensitive user complaint data, unauthorized data disclosure could lead to privacy violations, regulatory non-compliance, and reputational damage.

For European organizations, the impact of this vulnerability can be substantial. Complaint management systems often store personally identifiable information (PII) such as names, contact details, and complaint content. Exploitation could lead to unauthorized disclosure of PII, violating the EU General Data Protection Regulation (GDPR) and potentially resulting in heavy fines and legal consequences. Additionally, exposure of complaint data could undermine customer trust and damage organizational reputation. Since the vulnerability allows remote exploitation without authentication, attackers could target these systems en masse, increasing the risk of widespread data breaches. Organizations in sectors with high regulatory scrutiny, such as public services, healthcare, and consumer rights bodies, may face amplified consequences. Furthermore, the lack of patches means that organizations must rely on compensating controls until a fix is available, increasing operational complexity and risk.

To mitigate this vulnerability effectively, European organizations should immediately implement the following measures: 1) Conduct a thorough code review and apply input validation and parameterized queries (prepared statements) for all user inputs, especially 'fullname', 'email', and 'contactno' fields in user/registration.php. 2) Employ Web Application Firewalls (WAFs) configured to detect and block SQL Injection attempts targeting these parameters. 3) Restrict database user privileges to the minimum necessary, preventing unauthorized data access even if injection occurs. 4) Monitor application logs and database queries for unusual activity indicative of injection attempts. 5) If possible, isolate the complaint management system in a segmented network zone to limit lateral movement. 6) Engage with the vendor or development team to obtain or develop patches promptly. 7) Educate developers on secure coding practices to prevent similar vulnerabilities. 8) As an interim measure, consider disabling or restricting access to the vulnerable registration functionality if feasible. These steps go beyond generic advice by focusing on immediate protective controls and long-term secure development practices tailored to this specific vulnerability.