CVE-2026-1370: SIBS WooCommerce Plugin SQLi Vulnerability

CVE-2026-1370 Overview

The SIBS WooCommerce Payment Gateway plugin for WordPress contains a time-based SQL Injection vulnerability in all versions up to and including 2.2.0. The vulnerability exists in the referencedId parameter due to insufficient escaping of user-supplied input and lack of proper prepared statement usage in the existing SQL query. This allows authenticated attackers with Administrator-level access to append malicious SQL queries to existing database queries, potentially extracting sensitive information from the WordPress database.

Critical Impact

Authenticated administrators can exploit this SQL injection vulnerability to extract sensitive data from the WordPress database, including user credentials, payment information, and other confidential data stored by WooCommerce and associated plugins.

Affected Products

• SIBS WooCommerce Payment Gateway plugin versions up to and including 2.2.0
• WordPress installations using the vulnerable plugin
• WooCommerce stores with SIBS payment gateway integration

Discovery Timeline

• 2026-02-04 - CVE CVE-2026-1370 published to NVD
• 2026-02-04 - Last updated in NVD database

Technical Details for CVE-2026-1370

Vulnerability Analysis

This vulnerability is classified as CWE-89: Improper Neutralization of Special Elements used in an SQL Command (SQL Injection). The flaw resides in class-sibs-payment-gateway.php at line 1855, where the referencedId parameter is incorporated into a SQL query without proper sanitization or parameterization.

Time-based SQL injection is a blind injection technique where attackers infer information by observing response delays caused by database sleep functions. While exploitation requires administrator-level authentication, the vulnerability still poses significant risk as compromised admin accounts or insider threats could leverage this to exfiltrate sensitive payment and customer data from WooCommerce databases.

The network-accessible attack vector combined with low complexity makes this vulnerability relatively straightforward to exploit once an attacker has administrative credentials.

Root Cause

The root cause of this vulnerability is insufficient input validation and the absence of prepared statements when constructing SQL queries. The referencedId parameter is directly concatenated into SQL queries without proper escaping or use of WordPress's $wpdb->prepare() function. This allows attackers to inject arbitrary SQL syntax that gets executed by the database engine.

Specifically, the vulnerable code in class-sibs-payment-gateway.php fails to:

1. Sanitize user input before database operations
2. Use parameterized queries or prepared statements
3. Implement proper input validation for the referencedId parameter

Attack Vector

The attack is network-based and requires authenticated access with administrator privileges. An attacker would craft malicious input containing SQL injection payloads targeting the referencedId parameter. By using time-based blind injection techniques (such as MySQL's SLEEP() function or conditional delays), the attacker can systematically extract data from the database character by character by observing response timing differences.

The attack flow typically involves:

1. Authenticating as a WordPress administrator
2. Identifying the vulnerable endpoint handling the referencedId parameter
3. Injecting time-based SQL payloads to probe database structure
4. Systematically extracting sensitive data through conditional time delays

For technical details on the vulnerable code, see the WordPress Plugin Source Code.

Detection Methods for CVE-2026-1370

Indicators of Compromise

• Unusually slow response times on payment gateway operations, indicating potential time-based SQL injection probing
• Database query logs showing suspicious SQL patterns including SLEEP(), BENCHMARK(), or WAITFOR DELAY functions
• Administrator account activity logs showing repeated access to payment gateway functionality with unusual parameter values
• Unexpected database access patterns or data extraction from payment-related tables

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in the referencedId parameter
• Monitor application logs for anomalous timing patterns that may indicate time-based blind SQL injection attempts
• Enable WordPress database query logging and audit for suspicious SQL statements
• Deploy SentinelOne Singularity to detect and alert on SQL injection attack patterns targeting WordPress installations

Monitoring Recommendations

• Enable detailed logging for the SIBS payment gateway plugin operations
• Monitor database server performance metrics for unusual query execution times
• Implement real-time alerting for SQL syntax patterns commonly used in injection attacks
• Review administrator account activity regularly for suspicious payment gateway interactions

How to Mitigate CVE-2026-1370

Immediate Actions Required

• Update the SIBS WooCommerce Payment Gateway plugin to a version newer than 2.2.0 when available
• Audit administrator accounts and remove unnecessary admin privileges
• Review recent administrator activity logs for potential exploitation attempts
• Consider temporarily disabling the plugin if a patched version is not available and the payment gateway is not critical

Patch Information

Monitor the Wordfence Vulnerability Report for official patch announcements and updated plugin versions. Check the WordPress plugin repository regularly for security updates to the SIBS WooCommerce Payment Gateway plugin.

Workarounds

• Limit administrator account access to only trusted personnel with a legitimate need
• Implement additional authentication factors (MFA) for all WordPress administrator accounts
• Deploy a Web Application Firewall (WAF) configured to block SQL injection patterns
• Consider using WordPress security plugins like Wordfence to add an additional layer of SQL injection protection

# WordPress configuration - add to wp-config.php for enhanced database security
# Limit database user privileges (apply at database level)
# REVOKE ALL PRIVILEGES ON wordpress_db.* FROM 'wp_user'@'localhost';
# GRANT SELECT, INSERT, UPDATE, DELETE ON wordpress_db.* TO 'wp_user'@'localhost';

# Enable WordPress debug logging to monitor for suspicious queries
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);