CVE-2025-9643 is a medium-severity SQL Injection vulnerability identified in version 1.0 of the itsourcecode Apartment Management System. The vulnerability resides in the /setting/utility_bill_setup.php file, specifically in the handling of the txtGasBill parameter. An attacker can manipulate this parameter to inject malicious SQL code remotely without requiring any authentication or user interaction. This allows the attacker to potentially execute arbitrary SQL commands on the backend database. The vulnerability is exploitable over the network (AV:N) with low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The impact on confidentiality, integrity, and availability is limited (VC:L, VI:L, VA:L), indicating partial but not complete compromise of data or system functionality. Although no public exploits are currently known in the wild, the exploit code has been made publicly available, increasing the risk of exploitation. The vulnerability affects only version 1.0 of the product, and no official patches or mitigations have been published yet. The CVSS 4.0 score of 6.9 reflects a medium severity level, primarily due to the ease of exploitation and the potential for unauthorized data access or modification through SQL injection attacks.

For European organizations using the itsourcecode Apartment Management System version 1.0, this vulnerability poses a significant risk to the confidentiality and integrity of their data. Apartment management systems typically store sensitive tenant information, billing details, and payment records. Exploitation of this SQL injection flaw could allow attackers to access or modify tenant data, disrupt billing processes, or even escalate attacks to compromise the underlying database server. This could lead to data breaches involving personally identifiable information (PII), financial fraud, and operational disruptions. Given the remote and unauthenticated nature of the exploit, attackers could target these systems from anywhere, increasing the threat landscape. The impact is particularly critical for organizations that have not implemented additional network-level protections or input validation controls. Furthermore, the lack of available patches means organizations must rely on immediate mitigation strategies to reduce exposure. The medium severity rating suggests that while the vulnerability is serious, it may not lead to full system compromise or widespread service outages on its own, but it can serve as a foothold for further attacks.

1. Immediate input validation and sanitization: Organizations should implement strict server-side validation and sanitization of all inputs, especially the txtGasBill parameter, to prevent malicious SQL code from being executed. 2. Use of parameterized queries or prepared statements: Modify the application code to use parameterized queries to eliminate direct concatenation of user inputs into SQL statements. 3. Web application firewall (WAF): Deploy a WAF with rules specifically designed to detect and block SQL injection attempts targeting the vulnerable parameter. 4. Network segmentation and access controls: Restrict access to the Apartment Management System to trusted internal networks or VPNs to reduce exposure to remote attacks. 5. Monitoring and logging: Enable detailed logging of database queries and web requests to detect suspicious activities related to SQL injection attempts. 6. Vendor engagement: Contact itsourcecode for updates or patches and apply them promptly once available. 7. Temporary disablement or restriction: If feasible, temporarily disable or restrict access to the vulnerable utility_bill_setup.php functionality until a patch is released. 8. Conduct security assessments: Perform penetration testing and code reviews to identify and remediate other potential injection points within the application.