CVE-2025-4699 is a SQL Injection vulnerability identified in version 1.0 of the PHPGurukul Apartment Visitors Management System, specifically within the /admin/visitors-form.php file. The vulnerability arises from improper sanitization or validation of the 'Category' parameter, which is directly used in SQL queries. This flaw allows an unauthenticated remote attacker to inject malicious SQL code by manipulating the 'Category' argument, potentially leading to unauthorized data access, data modification, or database compromise. The vulnerability does not require any user interaction or privileges, making it remotely exploitable over the network. The CVSS 4.0 base score is 6.9, indicating a medium severity level, with attack vector being network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N). The impact on confidentiality, integrity, and availability is low to limited, suggesting that while the injection can be exploited, the scope of damage might be constrained by application or database configurations. No public exploits are currently known in the wild, but the vulnerability details have been disclosed publicly, increasing the risk of exploitation. The absence of patches or mitigation links indicates that users of the affected version must rely on manual remediation or vendor updates once available.

For European organizations using PHPGurukul Apartment Visitors Management System 1.0, this vulnerability poses a tangible risk of unauthorized database access or manipulation. Given that visitor management systems often store sensitive personal data such as visitor identities, timestamps, and access logs, exploitation could lead to breaches of personal data, violating GDPR requirements and resulting in regulatory penalties. Additionally, attackers could alter visitor records, potentially compromising physical security controls. The medium severity rating suggests that while the vulnerability is exploitable remotely without authentication, the impact may be limited by the system's role and database permissions. However, organizations relying on this system for critical access control or record-keeping could face operational disruptions or reputational damage if exploited. The lack of known exploits in the wild currently reduces immediate risk but the public disclosure increases the likelihood of future attacks targeting unpatched systems.

European organizations should immediately audit their use of PHPGurukul Apartment Visitors Management System version 1.0 and restrict access to the /admin/visitors-form.php interface to trusted administrators only, ideally via VPN or IP whitelisting. Implement web application firewalls (WAFs) with SQL injection detection and prevention rules tailored to the 'Category' parameter to block malicious payloads. Conduct code reviews and apply input validation and parameterized queries or prepared statements in the affected code to eliminate injection vectors. Until an official patch is released, consider isolating the application database with least privilege principles, ensuring the database user has minimal rights to reduce potential damage. Regularly monitor logs for suspicious query patterns or anomalous access attempts. Additionally, ensure backups of visitor data are maintained securely to enable recovery in case of data tampering. Finally, maintain awareness of vendor updates or security advisories for timely patch application.