CVE-2025-9420 is a SQL Injection vulnerability identified in the itsourcecode Apartment Management System version 1.0. The vulnerability resides in an unspecified function within the /floor/addfloor.php file, specifically involving the manipulation of the 'hdnid' parameter. An attacker can exploit this flaw by sending crafted input to the vulnerable parameter, which is not properly sanitized or validated, allowing arbitrary SQL commands to be injected and executed on the backend database. The attack vector is remote and does not require authentication or user interaction, making it accessible to unauthenticated attackers over the network. The vulnerability has a CVSS 4.0 base score of 6.9, categorized as medium severity, reflecting the potential for limited confidentiality, integrity, and availability impacts. Exploiting this vulnerability could allow attackers to extract sensitive data, modify or delete database records, or potentially escalate their privileges within the application environment. Although no known exploits are currently reported in the wild, the existence of a public exploit increases the risk of exploitation. The affected product is a niche apartment management system, which likely manages tenant, property, and financial data, making it a valuable target for attackers seeking to disrupt operations or steal personal information.

For European organizations using the itsourcecode Apartment Management System 1.0, this vulnerability poses a significant risk to the confidentiality and integrity of tenant and property management data. Successful exploitation could lead to unauthorized disclosure of personally identifiable information (PII), financial records, and operational data, potentially violating GDPR requirements and resulting in regulatory penalties. Data manipulation could disrupt apartment management operations, causing financial loss and reputational damage. Given the remote and unauthenticated nature of the attack, the threat is elevated, especially for organizations that have not applied any mitigations or patches. The impact is particularly critical for property management companies handling large volumes of sensitive tenant data or operating in jurisdictions with strict data protection laws. Additionally, the vulnerability could be leveraged as a foothold for further network intrusion or lateral movement within an organization's IT infrastructure.

To mitigate this vulnerability, organizations should immediately audit their deployment of the itsourcecode Apartment Management System and identify any instances running version 1.0. Since no official patch or update is currently available, it is critical to implement compensating controls such as web application firewalls (WAFs) configured to detect and block SQL injection attempts targeting the 'hdnid' parameter in /floor/addfloor.php. Input validation and sanitization should be enforced at the application level, ideally by modifying the source code to use parameterized queries or prepared statements to prevent injection. Restricting database user permissions to the minimum necessary can limit the impact of a successful injection. Monitoring and logging of database queries and web application traffic should be enhanced to detect anomalous activities indicative of exploitation attempts. Organizations should also consider isolating the affected system from critical network segments until a secure patch or update is released by the vendor. Finally, maintaining regular backups of the database will facilitate recovery in case of data tampering.