CVE-2025-12614 identifies a SQL injection vulnerability in the SourceCodester Best House Rental Management System version 1.0. The vulnerability exists in the delete_payment function located in the /admin_class.php file, where the ID argument is improperly sanitized, allowing an attacker to inject malicious SQL code. This injection can be performed remotely without user interaction but requires the attacker to have high privileges, indicating that authentication is necessary. The vulnerability can lead to unauthorized access or modification of database records, potentially compromising confidentiality, integrity, and availability of payment-related data. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:H means high privileges required), no user interaction (UI:N), and low impacts on confidentiality, integrity, and availability. Although no known exploits are currently active in the wild, proof-of-concept exploits have been published, increasing the risk of exploitation. The lack of official patches necessitates immediate mitigation efforts by users. The vulnerability affects only version 1.0 of the product, which is a niche rental management system, typically used by small to medium-sized enterprises managing property rentals.

For European organizations, exploitation of this vulnerability could result in unauthorized access to sensitive payment and rental data, leading to data breaches and potential financial fraud. The integrity of payment records could be compromised, causing inaccurate billing or deletion of payment history, which would disrupt business operations and damage trust with customers. Availability impacts could arise if attackers manipulate database queries to cause denial of service or data corruption. Given the nature of rental management systems, affected organizations might face regulatory scrutiny under GDPR for failing to protect personal and financial data. The medium severity rating reflects the requirement for high privileges, which somewhat limits the attack surface but does not eliminate risk, especially if internal accounts are compromised. Organizations relying on this software without proper security controls are at risk of targeted attacks, especially in countries with active real estate markets and digital transformation initiatives.

Since no official patches are currently available, European organizations should immediately implement strict input validation and sanitization on all parameters, especially the ID argument in the delete_payment function. Employing parameterized queries or prepared statements in the database access layer will prevent SQL injection. Restrict administrative access to trusted personnel and enforce strong authentication mechanisms to reduce the risk of privilege escalation. Conduct thorough code reviews and penetration testing focused on injection flaws. Monitor database logs for suspicious queries indicative of injection attempts. If possible, isolate the rental management system within a segmented network to limit lateral movement. Organizations should also consider migrating to updated or alternative rental management solutions with active security support. Finally, maintain up-to-date backups to recover from potential data manipulation or loss.