CVE-2025-6840 is a critical SQL Injection vulnerability identified in version 1.0 of the code-projects Product Inventory System, specifically within the /index.php file's Login component. The vulnerability arises due to improper sanitization or validation of the 'Username' parameter, allowing an attacker to inject malicious SQL code remotely without requiring authentication or user interaction. This flaw enables an attacker to manipulate backend database queries, potentially leading to unauthorized data access, data modification, or even full compromise of the underlying database. The vulnerability is remotely exploitable over the network, increasing its risk profile. Although the CVSS 4.0 score is 6.9 (medium severity), the exploitability metrics (AV:N/AC:L/AT:N/PR:N/UI:N) indicate that no privileges or user interaction are needed, which typically elevates the threat level. The vulnerability affects only version 1.0 of the product, and no patches or fixes have been publicly disclosed yet. No known exploits are currently reported in the wild, but public disclosure of the exploit details increases the likelihood of exploitation attempts. The lack of a patch and the critical nature of SQL Injection vulnerabilities make this a significant threat to organizations using this product.

For European organizations utilizing the code-projects Product Inventory System 1.0, this vulnerability poses a substantial risk. Successful exploitation could lead to unauthorized disclosure of sensitive inventory data, customer information, or internal business records, impacting confidentiality. Attackers could also alter or delete data, affecting data integrity and potentially disrupting business operations. Given that the vulnerability is in the login component, it could be leveraged to bypass authentication mechanisms, leading to further system compromise. This could result in operational downtime, financial losses, reputational damage, and regulatory non-compliance, especially under GDPR requirements concerning data protection. The remote and unauthenticated nature of the exploit increases the attack surface, making it easier for threat actors to target vulnerable systems across Europe. Organizations in sectors with high reliance on inventory management systems, such as retail, manufacturing, and logistics, are particularly at risk.

Immediate mitigation steps include implementing input validation and parameterized queries or prepared statements to prevent SQL Injection in the affected login component. Since no official patch is available, organizations should consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block SQL Injection attempts targeting the 'Username' parameter. Network segmentation and restricting access to the inventory system to trusted IP addresses can reduce exposure. Conducting thorough code reviews and penetration testing on the affected system is advised to identify and remediate similar vulnerabilities. Organizations should monitor network traffic and logs for suspicious activities related to SQL Injection attempts. Additionally, planning for an upgrade or replacement of the vulnerable product version once a patch is released is critical. Backup strategies should be reviewed and tested to ensure data recovery in case of compromise.