CVE-2025-7476 is a critical SQL Injection vulnerability identified in version 1.0 of the code-projects Simple Car Rental System, specifically within the /admin/approve.php file. The vulnerability arises from improper sanitization or validation of the 'ID' parameter, which is used in SQL queries. An attacker can remotely manipulate this parameter to inject malicious SQL code, potentially allowing unauthorized access to the backend database. This could lead to unauthorized data retrieval, modification, or deletion, compromising the confidentiality, integrity, and availability of the system's data. The vulnerability does not require any authentication or user interaction, making it remotely exploitable over the network. Although the CVSS 4.0 score is 6.9 (medium severity), the nature of SQL Injection vulnerabilities often allows attackers to escalate their privileges or pivot within the network, increasing the risk. The exploit has been publicly disclosed, increasing the likelihood of exploitation attempts. No official patches or fixes have been linked yet, which means affected systems remain vulnerable. The Simple Car Rental System is typically used by small to medium enterprises for managing vehicle rentals, and the admin approval functionality is critical for operational workflows, making this vulnerability particularly impactful if exploited.

For European organizations using the Simple Car Rental System 1.0, this vulnerability poses a significant risk. Exploitation could lead to unauthorized access to sensitive customer data, including personal and payment information, violating GDPR regulations and resulting in legal and financial penalties. Data integrity could be compromised, leading to incorrect rental approvals or fraudulent transactions, damaging business reputation and operational reliability. Availability of the system could also be affected if attackers execute destructive SQL commands, causing downtime and service disruption. Given the remote and unauthenticated nature of the exploit, attackers could target multiple organizations en masse, increasing the threat landscape. The public disclosure of the exploit further elevates the risk, as automated scanning and exploitation tools may be developed and deployed rapidly.

Organizations should immediately audit their use of the Simple Car Rental System 1.0 and restrict access to the /admin/approve.php endpoint to trusted IP addresses or VPNs. Implementing Web Application Firewalls (WAFs) with SQL Injection detection and prevention rules can help block exploit attempts. Developers should apply input validation and parameterized queries or prepared statements to sanitize the 'ID' parameter and other user inputs. Until an official patch is released, consider isolating the affected system from the internet or limiting administrative access. Regularly monitor logs for suspicious activity related to the 'ID' parameter and SQL errors. Organizations should also prepare incident response plans for potential data breaches and ensure backups are current and secure. Engaging with the vendor or community for updates or patches is critical to long-term remediation.