CVE-2025-40714 is a critical SQL injection vulnerability affecting versions prior to 4.7.0 of the Quiter Gateway product, which is a Java WAR application running on Apache Tomcat. The vulnerability stems from improper neutralization of special elements used in SQL commands (CWE-89) within the 'id_factura' parameter in the endpoint /<Client>FacturaE/listado_facturas_ficha.jsp. This flaw allows an unauthenticated remote attacker to inject malicious SQL code, enabling them to perform unauthorized actions on the backend database. Specifically, attackers can retrieve, create, update, and delete database records, potentially leading to full compromise of the data managed by the application. The CVSS 4.0 base score is 9.3, indicating a critical severity level, with attack vector being network (AV:N), no privileges required (PR:N), no user interaction (UI:N), and high impact on confidentiality, integrity, and availability (VC:H/VI:H/VA:H). The vulnerability does not require authentication or user interaction, making it highly exploitable remotely. Although no known exploits are currently reported in the wild, the nature of SQL injection vulnerabilities and the critical impact make this a high-risk issue that demands immediate attention. The vulnerability was reserved in April 2025 and published in July 2025, indicating recent discovery and disclosure. Quiter Gateway is typically deployed in enterprise environments for invoice management and related business processes, making the data and systems it protects highly sensitive.

For European organizations using Quiter Gateway, this vulnerability poses a severe risk to the confidentiality, integrity, and availability of critical business data, including financial and invoicing records. Exploitation could lead to unauthorized data disclosure, data manipulation, or deletion, disrupting business operations and causing financial losses. Additionally, compromised systems could be leveraged for further attacks within the corporate network or to exfiltrate sensitive customer and partner information, potentially violating GDPR and other data protection regulations. The lack of authentication requirement increases the attack surface, allowing attackers to exploit the vulnerability remotely without prior access. This could result in reputational damage, regulatory penalties, and loss of customer trust. Organizations in sectors such as finance, manufacturing, and public administration, where invoicing and transactional data are critical, are particularly at risk. The impact extends beyond data loss to potential operational downtime and increased incident response costs.

European organizations should prioritize upgrading Quiter Gateway to version 4.7.0 or later, where this vulnerability is patched. Until an upgrade is possible, organizations should implement strict input validation and sanitization on the 'id_factura' parameter to prevent injection of malicious SQL commands. Employing Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting this endpoint can provide interim protection. Conduct thorough code reviews and security testing focusing on SQL injection vectors in all web-facing components. Restrict network access to the Quiter Gateway application to trusted IP ranges where feasible, reducing exposure. Implement database-level protections such as least privilege principles for the database user accounts used by the application, limiting the potential damage of a successful injection. Monitor logs and alerts for unusual database queries or access patterns indicative of exploitation attempts. Finally, ensure incident response plans are updated to address potential SQL injection incidents involving this product.