CVE-2025-4550 is a SQL Injection vulnerability identified in version 1.0 of the PHPGurukul Apartment Visitors Management System. The vulnerability resides in the /admin/pass-details.php file, specifically in the handling of the 'pid' parameter. An attacker can manipulate this parameter to inject malicious SQL code, potentially allowing unauthorized access to the backend database. This vulnerability is remotely exploitable without requiring any authentication or user interaction, making it particularly dangerous. The CVSS 4.0 base score is 6.9, indicating a medium severity level. The vector details (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L) show that the attack can be performed over the network with low complexity, no privileges, and no user interaction, but the impact on confidentiality, integrity, and availability is limited rather than complete. The vulnerability affects only version 1.0 of the product, and no official patches or fixes have been published yet. Although no known exploits are currently active in the wild, the public disclosure of the exploit code increases the risk of exploitation. SQL Injection vulnerabilities can lead to data leakage, unauthorized data modification, or even full system compromise depending on the database privileges and application architecture. Given the nature of the product—a visitor management system used in apartment complexes—successful exploitation could expose sensitive visitor logs, resident information, and potentially allow attackers to manipulate access controls or surveillance data.

For European organizations, particularly residential property management companies and apartment complexes using PHPGurukul's Apartment Visitors Management System, this vulnerability poses a significant risk to data confidentiality and integrity. Exposure of visitor logs and resident information could lead to privacy violations under GDPR regulations, resulting in legal and financial penalties. Additionally, manipulation of visitor data could undermine physical security controls, potentially allowing unauthorized access to residential buildings. The medium severity rating reflects limited but meaningful impact, as the vulnerability does not require authentication and can be exploited remotely. However, the scope is limited to organizations using this specific version of the software. The lack of known active exploits currently reduces immediate risk but the public availability of exploit details means attackers could develop and deploy attacks rapidly. European organizations must consider the reputational damage and compliance risks associated with data breaches stemming from this vulnerability.

1. Immediate mitigation should involve disabling or restricting access to the /admin/pass-details.php endpoint, especially from untrusted networks, until a patch is available. 2. Implement Web Application Firewall (WAF) rules specifically designed to detect and block SQL Injection attempts targeting the 'pid' parameter. 3. Conduct a thorough audit of all input validation and sanitization mechanisms in the application, focusing on parameters that interact with the database. 4. If possible, upgrade or migrate to a newer, patched version of the PHPGurukul Apartment Visitors Management System once available. 5. Employ database-level protections such as least privilege principles for the application database user to limit the impact of a successful injection. 6. Monitor logs for unusual database queries or access patterns indicative of exploitation attempts. 7. Educate administrative users about the risk and ensure strong network segmentation to limit exposure of the management interface. 8. Consider deploying runtime application self-protection (RASP) tools that can detect and block injection attacks in real time.