CVE-2025-4900 is a critical SQL Injection vulnerability identified in version 1.0 of the Campcodes Sales and Inventory System, specifically within an unspecified function in the /pages/payment.php file. The vulnerability arises from improper sanitization or validation of the 'cid' parameter, which is susceptible to malicious input manipulation. An attacker can exploit this flaw remotely without requiring authentication or user interaction, by injecting crafted SQL commands through the 'cid' argument. This can lead to unauthorized access to the backend database, allowing attackers to read, modify, or delete sensitive data related to sales and inventory records. The vulnerability has been publicly disclosed, increasing the risk of exploitation, although no known exploits have been reported in the wild yet. The CVSS 4.0 base score is 6.9, categorized as medium severity, reflecting the ease of remote exploitation without privileges but with limited scope and impact on confidentiality, integrity, and availability. The vulnerability does not require user interaction or privileges, making it more accessible to attackers. However, the impact on the system's overall security posture is somewhat limited by the lack of complete system compromise or widespread availability of exploits. The absence of a patch or mitigation details in the disclosure indicates that organizations using this software must proactively implement protective measures to mitigate risk.

For European organizations utilizing the Campcodes Sales and Inventory System 1.0, this vulnerability poses a significant risk to the confidentiality and integrity of critical business data, including sales transactions and inventory records. Successful exploitation could lead to data breaches, financial fraud, manipulation of inventory data, and disruption of business operations. Given the remote and unauthenticated nature of the attack vector, threat actors could leverage this vulnerability to gain unauthorized database access, potentially leading to regulatory compliance violations under GDPR due to exposure of personal or sensitive data. The impact is particularly severe for small and medium enterprises relying heavily on this system for daily operations, as data integrity issues could affect supply chain management and customer trust. Additionally, the public disclosure of the vulnerability increases the likelihood of opportunistic attacks targeting European companies before patches or mitigations are applied.

Since no official patches are currently available, European organizations should implement immediate compensating controls. These include deploying web application firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting the 'cid' parameter in /pages/payment.php. Input validation and sanitization should be enforced at the application level, ensuring that all user-supplied data is properly escaped or parameterized before database queries. Organizations should conduct thorough code reviews and penetration testing focusing on SQL injection vectors within the application. Network segmentation can limit access to the vulnerable system from untrusted networks. Monitoring and logging of database queries and web server access should be enhanced to detect suspicious activity indicative of exploitation attempts. Finally, organizations should engage with the vendor for updates and patches and plan for timely application once available.