CVE-2025-6935 is a critical SQL Injection vulnerability identified in version 1.0 of the Campcodes Sales and Inventory System, specifically within the /pages/payment_add.php file. The vulnerability arises from improper sanitization or validation of the 'cid' parameter, which an attacker can manipulate to inject malicious SQL code. This injection flaw allows remote attackers to execute arbitrary SQL commands on the backend database without requiring authentication or user interaction. The vulnerability's CVSS 4.0 score is 6.9, indicating a medium severity level, with an attack vector that is network-based and requires no privileges or user interaction. The impact on confidentiality, integrity, and availability is limited but present, as the vulnerability can lead to unauthorized data access, modification, or deletion within the affected system. Although no known exploits are currently reported in the wild, the public disclosure of the exploit increases the risk of exploitation. The lack of available patches or mitigation guidance from the vendor further exacerbates the threat. The vulnerability affects only version 1.0 of the Campcodes Sales and Inventory System, which is used to manage sales and inventory data, making it a critical asset for organizations relying on this software for business operations.

For European organizations using Campcodes Sales and Inventory System 1.0, this SQL Injection vulnerability poses a significant risk to the confidentiality and integrity of sensitive business data, including sales records, inventory details, and potentially customer payment information. Successful exploitation could lead to unauthorized data disclosure, data tampering, or disruption of inventory and sales operations, impacting business continuity and trust. Given the remote exploitability without authentication, attackers could leverage this vulnerability to gain persistent access or pivot within the network, potentially leading to broader compromise. The impact is particularly concerning for sectors with stringent data protection regulations such as GDPR, where data breaches could result in legal penalties and reputational damage. Additionally, the lack of patches means organizations must rely on alternative mitigation strategies to protect their systems until an official fix is released.

European organizations should implement immediate compensating controls to mitigate this vulnerability. First, apply strict input validation and sanitization on the 'cid' parameter at the web application firewall (WAF) or reverse proxy level to block malicious SQL payloads. Deploy WAF rules specifically designed to detect and prevent SQL Injection attempts targeting the payment_add.php endpoint. Conduct thorough code reviews and implement parameterized queries or prepared statements in the application code to eliminate injection vectors once source code access is available. Restrict database permissions for the application user to the minimum necessary, preventing unauthorized data manipulation or access escalation. Monitor logs for unusual database queries or access patterns indicative of exploitation attempts. Network segmentation should be enforced to isolate the affected system from critical infrastructure. Finally, maintain regular backups of sales and inventory data to enable recovery in case of data corruption or deletion.