CVE-2025-8157 is a SQL Injection vulnerability identified in PHPGurukul User Registration & Login and User Management version 3.3. The vulnerability exists in the /admin/lastthirtyays-reg-users.php file, specifically through the manipulation of the 'ID' parameter. An attacker can remotely exploit this flaw without requiring user interaction or elevated privileges, by injecting malicious SQL code into the ID argument. This can lead to unauthorized access to the backend database, potentially allowing attackers to read, modify, or delete sensitive user data, escalate privileges, or disrupt application functionality. The vulnerability has been publicly disclosed, increasing the risk of exploitation, although no known active exploits have been reported in the wild to date. The CVSS 4.0 base score is 5.3, indicating a medium severity level, reflecting the ease of remote exploitation without authentication but limited impact on confidentiality, integrity, and availability due to partial scope and low impact metrics. The vulnerability does not require user interaction and can be triggered remotely, making it a significant concern for affected deployments. However, the lack of a patch or vendor-provided mitigation at this time increases the urgency for organizations to implement compensating controls.

For European organizations using PHPGurukul User Registration & Login and User Management 3.3, this vulnerability poses a risk to the confidentiality and integrity of user data, including personally identifiable information (PII) and authentication credentials. Exploitation could lead to unauthorized data disclosure, data tampering, or denial of service, undermining trust and potentially violating GDPR requirements for data protection and breach notification. Organizations in sectors with high regulatory scrutiny, such as finance, healthcare, and public administration, could face significant compliance and reputational consequences. The remote and unauthenticated nature of the attack vector increases the threat surface, especially for externally accessible administrative interfaces. While the CVSS score suggests medium severity, the potential for data breaches and service disruption makes this vulnerability a critical concern for organizations relying on this software for user management.

Given the absence of an official patch, European organizations should immediately audit their use of PHPGurukul User Registration & Login and User Management version 3.3 and consider the following mitigations: 1) Restrict access to the /admin/lastthirtyays-reg-users.php endpoint using network-level controls such as IP whitelisting or VPN access to limit exposure to trusted administrators only. 2) Implement Web Application Firewall (WAF) rules specifically designed to detect and block SQL injection attempts targeting the 'ID' parameter, using signature-based and anomaly detection techniques. 3) Conduct thorough input validation and sanitization on all user-supplied parameters, especially the 'ID' argument, to prevent injection of malicious SQL code. 4) Monitor application logs and database queries for unusual activity indicative of exploitation attempts. 5) Plan and prioritize upgrading or replacing the vulnerable software component with a patched or more secure alternative once available. 6) Educate administrators and developers about the risks of SQL injection and secure coding practices to prevent similar vulnerabilities in the future.