CVE-2022-25149: WP Statistics Plugin SQLi Vulnerability

CVE-2022-25149 Overview

CVE-2022-25149 is a SQL Injection vulnerability affecting the WP Statistics WordPress plugin. The vulnerability exists due to insufficient escaping and parameterization of the IP parameter found in the ~/includes/class-wp-statistics-hits.php file. This flaw allows unauthenticated attackers to inject arbitrary SQL queries to obtain sensitive information from the WordPress database, potentially exposing user credentials, personal data, and other confidential information stored within the affected WordPress installation.

Critical Impact

Unauthenticated attackers can extract sensitive database information through SQL Injection without any user interaction or special privileges required.

Affected Products

• WP Statistics WordPress plugin versions up to and including 13.1.5
• VeronaLabs WP Statistics for WordPress

Discovery Timeline

• 2022-02-24 - CVE-2022-25149 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-25149

Vulnerability Analysis

This SQL Injection vulnerability stems from improper handling of user-controlled input in the WP Statistics plugin. The IP parameter within the class-wp-statistics-hits.php file does not undergo proper sanitization or parameterized query construction before being incorporated into SQL statements. This allows attackers to manipulate database queries by injecting malicious SQL code through the IP parameter.

The vulnerability is particularly dangerous because it requires no authentication, meaning any remote attacker with network access to a WordPress site running the vulnerable plugin version can exploit this flaw. Successful exploitation enables attackers to read arbitrary data from the database, including sensitive user information, configuration details, and potentially administrator credentials.

Root Cause

The root cause of this vulnerability is the lack of proper input validation and the failure to use prepared statements with parameterized queries when handling the IP parameter. The affected code directly incorporates user-supplied data into SQL queries without proper escaping, creating a classic SQL Injection vector. The class-wp-statistics-hits.php file processes visitor hit tracking data but fails to sanitize the IP address input before using it in database operations.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. An attacker can craft malicious HTTP requests containing SQL injection payloads within the IP parameter. These requests are processed by the plugin, and the unsanitized input is passed directly to the database engine.

The attacker can leverage various SQL Injection techniques including:

• Union-based injection to extract data from other database tables
• Boolean-based blind injection to enumerate database contents character by character
• Time-based blind injection when direct output is not available
• Error-based injection if database errors are displayed

Since no authentication is required, the attack surface is significantly expanded, putting all WordPress installations using affected versions at risk.

Detection Methods for CVE-2022-25149

Indicators of Compromise

• Unusual or malformed IP addresses in web server access logs containing SQL syntax characters such as single quotes, semicolons, or UNION SELECT statements
• Database query logs showing unexpected or malicious SQL queries originating from the WP Statistics plugin
• Anomalous database read operations or data extraction attempts in monitoring systems
• Web Application Firewall (WAF) alerts for SQL Injection patterns targeting WordPress endpoints

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL Injection attempts targeting the IP parameter
• Monitor WordPress database logs for suspicious query patterns or unauthorized data access
• Implement intrusion detection systems (IDS) with signatures for common SQL Injection attack patterns
• Utilize SentinelOne's Singularity platform to detect post-exploitation activities and anomalous database interactions

Monitoring Recommendations

• Enable verbose logging on the WordPress database to capture all queries executed by the WP Statistics plugin
• Configure real-time alerting for SQL syntax patterns appearing in HTTP request parameters
• Regularly audit the WP Statistics plugin version and ensure timely updates
• Monitor network traffic for data exfiltration attempts following potential SQL Injection exploitation

How to Mitigate CVE-2022-25149

Immediate Actions Required

• Update WP Statistics plugin to version 13.1.6 or later immediately
• Review database access logs for any signs of prior exploitation
• Implement Web Application Firewall rules to block SQL Injection attempts as a temporary measure
• Consider temporarily disabling the WP Statistics plugin until patching is complete if immediate update is not possible

Patch Information

VeronaLabs has addressed this vulnerability in versions released after 13.1.5. The fix implements proper input sanitization and parameterized queries for the IP parameter in the class-wp-statistics-hits.php file. Administrators should update to the latest available version through the WordPress plugin repository or via the WordPress Plugin Changeset where the security fix was committed.

For additional technical details about this vulnerability, refer to the Wordfence Vulnerability Advisory and the GitHub Gist PoC.

Workarounds

• Deploy a Web Application Firewall (WAF) with SQL Injection detection rules to filter malicious requests before they reach the vulnerable plugin
• Implement network-level access controls to restrict access to WordPress administrative and plugin functionality
• Use database account permissions to limit the privileges of the WordPress database user, reducing the potential impact of SQL Injection attacks
• Enable WordPress security plugins that provide real-time protection against SQL Injection attempts

# Configuration example - WAF rule to block SQL injection in IP parameters
# Add to .htaccess for Apache or nginx configuration
# Apache mod_rewrite example
RewriteEngine On
RewriteCond %{QUERY_STRING} (union.*select|select.*from|insert.*into|drop.*table) [NC]
RewriteRule ^(.*)$ - [F,L]