CVE-2026-1370 identifies a SQL Injection vulnerability in the SIBS woocommerce payment gateway plugin for WordPress, present in all versions up to and including 2.2.0. The vulnerability stems from improper neutralization of special elements in SQL commands (CWE-89), specifically through the 'referencedId' parameter. This parameter is insufficiently escaped and the SQL queries are not properly prepared, allowing an authenticated attacker with administrator privileges to inject additional SQL commands. The attack is time-based, enabling extraction of sensitive information from the backend database by measuring response delays. The vulnerability does not require user interaction but does require high-level privileges, limiting the attack surface to compromised or malicious administrators. The CVSS 3.1 base score is 4.9 (medium), reflecting network attack vector, low attack complexity, high privileges required, no user interaction, and high confidentiality impact but no integrity or availability impact. No public exploits or patches are currently available, increasing the urgency for defensive measures. This vulnerability is particularly critical in e-commerce environments where payment gateways handle sensitive financial and customer data. The plugin's widespread use in WordPress WooCommerce setups makes it a relevant threat for organizations relying on this payment gateway for transaction processing.

For European organizations, exploitation of this vulnerability could lead to unauthorized disclosure of sensitive payment and customer data stored in the backend database, violating GDPR and other data protection regulations. Although the attack requires administrator-level access, insider threats or compromised admin accounts could leverage this flaw to exfiltrate confidential information. The impact is primarily on confidentiality, with no direct effect on data integrity or service availability. However, data breaches could result in reputational damage, regulatory fines, and loss of customer trust. E-commerce businesses using the SIBS woocommerce payment gateway are at particular risk, especially those processing large volumes of transactions or handling sensitive financial data. The vulnerability could also be leveraged as part of a broader attack chain if attackers gain initial admin access through other means. Given the medium severity and lack of known exploits, the immediate risk is moderate but could escalate if exploit code becomes publicly available.

Immediate mitigation involves restricting administrator access to trusted personnel and monitoring admin activities for suspicious behavior. Organizations should implement strict access controls and multi-factor authentication to reduce the risk of compromised admin accounts. Since no official patch is currently available, administrators can apply temporary mitigations such as input validation and sanitization on the 'referencedId' parameter, or use Web Application Firewalls (WAF) with custom rules to detect and block SQL injection patterns targeting this parameter. Regularly audit and monitor database queries and logs for anomalies indicative of injection attempts. Once a vendor patch is released, promptly update the plugin to the fixed version. Additionally, consider isolating the payment gateway database access with least privilege principles to minimize data exposure. Conduct security awareness training for administrators about the risks of SQL injection and the importance of secure plugin management.