CVE-2025-6356 is a SQL Injection vulnerability identified in version 1.0 of the code-projects Simple Pizza Ordering System, specifically within the /addmem.php file. This vulnerability arises from improper input validation or sanitization in the processing of user-supplied data, allowing an attacker to inject malicious SQL queries remotely without requiring authentication or user interaction. Exploiting this flaw could enable an attacker to manipulate the backend database, potentially leading to unauthorized data access, data modification, or deletion. The vulnerability has been publicly disclosed, increasing the risk of exploitation, although no known exploits are currently reported in the wild. The CVSS 4.0 base score is 6.9, indicating a medium severity level, with attack vector being network-based, no privileges or user interaction required, and limited impact on confidentiality, integrity, and availability. The lack of a vendor patch or mitigation guidance at this time further elevates the risk for affected deployments. Given that the Simple Pizza Ordering System is a specialized application likely used by small to medium-sized food service businesses, the vulnerability could be leveraged to compromise customer data, order information, or disrupt business operations if exploited.

For European organizations, particularly small and medium enterprises (SMEs) in the food service sector using the Simple Pizza Ordering System, this vulnerability poses a significant risk. Successful exploitation could lead to unauthorized access to customer personal data, including order histories and payment information, potentially violating GDPR regulations and resulting in legal and financial penalties. Additionally, attackers could alter or delete order data, causing operational disruptions and reputational damage. The remote and unauthenticated nature of the exploit increases the likelihood of automated attacks, especially since the vulnerability is publicly disclosed. While the overall impact on large enterprises may be limited due to less likelihood of using this specific system, SMEs and local food businesses across Europe could face direct consequences. Furthermore, compromised systems could be used as pivot points for broader network intrusions, especially if integrated with other business systems.

Given the absence of an official patch, European organizations should implement immediate compensating controls. First, restrict network access to the affected /addmem.php endpoint by using web application firewalls (WAFs) configured with custom rules to detect and block SQL injection patterns targeting this specific script. Input validation and sanitization should be enforced at the application layer, potentially by deploying reverse proxies or API gateways that sanitize inputs before reaching the backend. Organizations should conduct thorough code reviews and consider applying manual code fixes to sanitize inputs if source code access is available. Monitoring and logging of database queries and web server access logs should be enhanced to detect suspicious activities indicative of SQL injection attempts. Additionally, isolating the affected system within segmented network zones reduces lateral movement risks. Finally, organizations should prepare incident response plans specific to database compromise scenarios and ensure regular backups of critical data are maintained offline to enable recovery in case of data tampering or deletion.