CVE-2026-2579: WowStore WordPress Plugin SQLi Vulnerability

CVE-2026-2579 Overview

The WowStore – Store Builder & Product Blocks for WooCommerce plugin for WordPress contains a SQL Injection vulnerability in the search parameter. This vulnerability exists in all versions up to and including 4.4.3 due to insufficient escaping on user-supplied input and lack of proper preparation on the existing SQL query. Unauthenticated attackers can exploit this flaw to append additional SQL queries into already existing queries, enabling extraction of sensitive information from the database.

Critical Impact

Unauthenticated attackers can extract sensitive database information including user credentials, customer data, and potentially gain access to the entire WordPress database through SQL injection exploitation.

Affected Products

• WowStore – Store Builder & Product Blocks for WooCommerce plugin versions up to and including 4.4.3
• WordPress installations running vulnerable WowStore plugin versions
• WooCommerce stores utilizing the WowStore plugin for product blocks

Discovery Timeline

• 2026-03-17 - CVE-2026-2579 published to NVD
• 2026-03-17 - Last updated in NVD database

Technical Details for CVE-2026-2579

Vulnerability Analysis

This vulnerability is classified as CWE-89: SQL Injection, which occurs when user-controllable input is incorporated into database queries without proper sanitization or parameterization. The WowStore plugin fails to properly escape or prepare SQL queries when processing the search parameter, creating a classic SQL injection attack surface.

The vulnerability is accessible over the network without requiring any authentication or user interaction, making it particularly dangerous for publicly accessible WordPress sites. Successful exploitation results in unauthorized access to confidential database information, though the vulnerability does not directly impact data integrity or system availability.

Root Cause

The root cause of this vulnerability lies in improper input validation within the plugin's codebase. The affected code can be found in the Functions.php and REST_API.php files, where user-supplied search parameters are incorporated into SQL queries without adequate sanitization or use of prepared statements. WordPress provides the $wpdb->prepare() method specifically to prevent SQL injection, but the vulnerable code paths bypass this security mechanism.

Attack Vector

The attack vector is network-based, targeting the REST API endpoints exposed by the WowStore plugin. An unauthenticated attacker can craft malicious HTTP requests containing SQL injection payloads in the search parameter. When the vulnerable application processes these requests, the malicious SQL code is executed against the backend database.

The exploitation typically involves:

1. Identifying WordPress sites running vulnerable WowStore plugin versions
2. Locating the REST API endpoints that process search functionality
3. Crafting SQL injection payloads to extract database schema information
4. Progressively extracting sensitive data such as user credentials, customer information, or payment details

Due to the nature of SQL injection, attackers may employ techniques such as UNION-based injection, blind boolean-based injection, or time-based injection depending on the application's response behavior. For detailed technical analysis of the vulnerable code paths, refer to the WordPress Plugin Code Reference and the Wordfence Vulnerability Report.

Detection Methods for CVE-2026-2579

Indicators of Compromise

• Unusual or malformed requests to WowStore REST API endpoints containing SQL syntax characters such as single quotes, semicolons, or UNION keywords
• Database query errors appearing in WordPress debug logs or error logs
• Unexpected database read operations or elevated database load patterns
• Evidence of data exfiltration in web server access logs targeting the search parameter

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in the search parameter
• Monitor access logs for requests to WowStore REST API endpoints with suspicious query strings
• Implement database activity monitoring to detect anomalous query patterns or unauthorized data access
• Use WordPress security plugins to scan for known vulnerable plugin versions

Monitoring Recommendations

• Enable WordPress debug logging temporarily to identify potential exploitation attempts in a controlled manner
• Configure alerting for database errors that may indicate SQL injection probing
• Review web server logs for POST requests to REST API endpoints containing encoded or obfuscated payloads
• Monitor for bulk data extraction patterns that could indicate successful exploitation

How to Mitigate CVE-2026-2579

Immediate Actions Required

• Update the WowStore – Store Builder & Product Blocks for WooCommerce plugin to a patched version above 4.4.3 immediately
• If immediate patching is not possible, consider temporarily deactivating the WowStore plugin until a secure version can be deployed
• Review database access logs for signs of prior exploitation
• Consider rotating database credentials and WordPress secret keys as a precautionary measure

Patch Information

Organizations should update the WowStore plugin to the latest available version that addresses this SQL injection vulnerability. The vulnerable code resides in the Functions.php and REST_API.php files. Check the official WordPress plugin repository for the patched release and verify the version number is greater than 4.4.3. For additional vulnerability details, consult the Wordfence Vulnerability Report.

Workarounds

• Implement a Web Application Firewall (WAF) with SQL injection protection rules to filter malicious requests targeting the search parameter
• Restrict access to REST API endpoints using WordPress access control plugins or server-level IP restrictions
• Temporarily disable search functionality within the WowStore plugin if granular control is available
• Consider implementing additional input validation at the web server level using ModSecurity or similar tools

# Example ModSecurity rule to block SQL injection attempts
SecRule ARGS:search "@detectSQLi" \
    "id:1001,\
    phase:2,\
    block,\
    msg:'SQL Injection attempt detected in WowStore search parameter',\
    log,\
    severity:CRITICAL"