CVE-2025-65379 identifies a SQL Injection vulnerability in PHPGurukul Billing System version 1.0, located in the /admin/password-recovery.php endpoint. The vulnerability stems from the lack of input validation on the 'username' and 'mobileno' parameters, which are directly concatenated into SQL queries without sanitization or parameterization. This flaw allows an unauthenticated attacker to inject malicious SQL code, potentially enabling unauthorized access to sensitive information or manipulation of database records. The vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). The CVSS v3.1 base score is 6.5, indicating medium severity, with attack vector network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and impacts on confidentiality and integrity (C:L/I:L) but no impact on availability (A:N). No patches or known exploits are currently documented, but the vulnerability represents a significant risk if exploited. The absence of authentication requirements and user interaction lowers the barrier for exploitation, making it a viable attack vector for threat actors targeting organizations using this billing system.

For European organizations using PHPGurukul Billing System 1.0, this vulnerability could lead to unauthorized disclosure of sensitive customer or financial data due to SQL Injection attacks. Attackers could manipulate or extract data from the backend database, potentially compromising confidentiality and integrity of billing records and user credentials. This could result in financial fraud, reputational damage, and regulatory non-compliance, especially under GDPR requirements for data protection. The lack of availability impact means service disruption is unlikely, but data breaches could have significant legal and operational consequences. SMEs and enterprises relying on this billing system for financial operations are particularly at risk. The medium severity indicates a moderate but actionable threat that should be addressed promptly to prevent exploitation.

To mitigate CVE-2025-65379, organizations should immediately review and update the /admin/password-recovery.php endpoint to implement proper input validation and sanitization for the 'username' and 'mobileno' parameters. The preferred approach is to use parameterized queries or prepared statements to prevent SQL Injection. Additionally, database user permissions should be minimized to restrict access to only necessary data and operations, reducing potential damage from exploitation. Implementing Web Application Firewalls (WAFs) with SQL Injection detection rules can provide an additional layer of defense. Regular security audits and code reviews should be conducted to identify and remediate similar vulnerabilities. If an official patch becomes available from PHPGurukul, it should be applied promptly. Organizations should also monitor logs for suspicious activity related to the password recovery endpoint and consider temporarily disabling or restricting access to this functionality if feasible until remediation is complete.