CVE-2025-4934 is a critical SQL Injection vulnerability identified in version 3.3 of the PHPGurukul User Registration & Login and User Management System. The vulnerability exists in the /edit-profile.php file, specifically through the manipulation of the 'Contact' parameter. An attacker can remotely exploit this flaw without requiring any authentication or user interaction, by injecting malicious SQL code into the vulnerable parameter. This can lead to unauthorized access to the backend database, allowing attackers to read, modify, or delete sensitive user data, potentially compromising the confidentiality, integrity, and availability of the system. The vulnerability is classified with a CVSS 4.0 base score of 6.9, indicating a medium severity level, primarily due to the limited scope of impact (low confidentiality, integrity, and availability impact) but with ease of exploitation (network attack vector, no privileges or user interaction required). Although no known exploits are currently observed in the wild, the public disclosure of the vulnerability increases the risk of exploitation. The lack of available patches or mitigation guidance from the vendor further elevates the threat. Given the nature of the affected system—a user registration and login management platform—successful exploitation could lead to significant user data breaches and unauthorized account manipulations.

For European organizations using PHPGurukul User Registration & Login and User Management System version 3.3, this vulnerability poses a significant risk to user data security and system integrity. Exploitation could lead to unauthorized disclosure of personal data, violating GDPR and other data protection regulations, potentially resulting in legal penalties and reputational damage. The ability to modify or delete user information could disrupt business operations and user trust. Since the system manages authentication and user profiles, attackers might leverage this vulnerability to escalate privileges or pivot to other internal systems. The remote and unauthenticated nature of the exploit increases the attack surface, especially for organizations with externally accessible web applications. This threat is particularly concerning for sectors handling sensitive personal or financial data, such as healthcare, finance, and e-commerce within Europe.

1. Immediate mitigation should include implementing input validation and parameterized queries or prepared statements in the /edit-profile.php script to prevent SQL injection. 2. Organizations should conduct a thorough code review of the affected module and other similar input points to identify and remediate injection flaws. 3. Deploy Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting the 'Contact' parameter. 4. Restrict database user privileges to the minimum necessary to limit the impact of a successful injection attack. 5. Monitor logs for unusual database queries or errors indicative of injection attempts. 6. If possible, isolate or temporarily disable the vulnerable functionality until a vendor patch or official fix is released. 7. Educate development teams on secure coding practices to prevent future injection vulnerabilities. 8. Regularly update and patch all components of the user management system as new fixes become available.