CVE-2025-7543 is a SQL Injection vulnerability identified in version 3.3 of the PHPGurukul User Registration & Login and User Management System. The vulnerability resides in the /admin/manage-users.php file, specifically involving the manipulation of the 'ID' parameter. An attacker can remotely exploit this flaw without requiring user interaction or elevated privileges, by crafting malicious input that alters the intended SQL query logic. This can lead to unauthorized access to the backend database, allowing attackers to read, modify, or delete sensitive user data stored within the system. The vulnerability has been publicly disclosed, increasing the risk of exploitation, although no known active exploits have been reported in the wild at this time. The CVSS v4.0 base score is 5.3, categorized as medium severity, reflecting that while the attack vector is network-based and requires no authentication, the impact on confidentiality, integrity, and availability is limited to low levels. The vulnerability does not involve scope changes or user interaction, but the presence of a SQL injection in an administrative interface poses a significant risk to the integrity and confidentiality of user management data if exploited.

For European organizations using PHPGurukul's User Registration & Login and User Management System version 3.3, this vulnerability could lead to unauthorized data exposure or manipulation of user accounts. Given that user management systems often contain personally identifiable information (PII), exploitation could result in GDPR violations with substantial fines and reputational damage. The ability to remotely exploit the vulnerability without authentication increases the risk of automated attacks targeting exposed administrative endpoints. This could disrupt user management operations, potentially allowing attackers to escalate privileges or create backdoors. Organizations in sectors with strict data protection requirements, such as finance, healthcare, and government, are particularly at risk. The medium severity score suggests that while the vulnerability is serious, the impact might be contained if proper network segmentation and monitoring are in place. However, the public disclosure and availability of exploit details increase the urgency for mitigation to prevent data breaches and operational disruptions.

1. Immediate patching or upgrading to a fixed version of the PHPGurukul system is the most effective mitigation; if unavailable, apply virtual patching via Web Application Firewalls (WAF) to block malicious payloads targeting the 'ID' parameter in /admin/manage-users.php. 2. Restrict access to the administrative interface by IP whitelisting or VPN-only access to reduce exposure to external attackers. 3. Implement strict input validation and parameterized queries in the application code to prevent SQL injection attacks. 4. Conduct thorough security audits and code reviews focusing on all user input handling in the user management modules. 5. Monitor logs for unusual database queries or repeated failed attempts to access administrative functions. 6. Employ database-level access controls to limit the impact of any successful injection, such as using least privilege accounts for the web application. 7. Educate system administrators and developers about the risks of SQL injection and the importance of secure coding practices.