CVE-2022-0513: WP Statistics SQL Injection Vulnerability

CVE-2022-0513 Overview

CVE-2022-0513 is a SQL Injection vulnerability affecting the WP Statistics WordPress plugin. The vulnerability exists due to insufficient escaping and parameterization of the exclusion_reason parameter found in the ~/includes/class-wp-statistics-exclusion.php file. This flaw allows attackers without authentication to inject arbitrary SQL queries to obtain sensitive information from the WordPress database.

The vulnerability impacts versions up to and including 13.1.4 of WP Statistics. Importantly, exploitation requires the "Record Exclusions" option to be enabled on the vulnerable site, which limits the attack surface but still presents a significant risk for sites with this feature activated.

Critical Impact

Unauthenticated attackers can extract sensitive database information including user credentials, configuration data, and other confidential content without any authentication requirements.

Affected Products

• WP Statistics WordPress plugin versions up to and including 13.1.4
• Veronalabs WP Statistics for WordPress

Discovery Timeline

• 2022-02-16 - CVE-2022-0513 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-0513

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) resides in the exclusion handling functionality of the WP Statistics plugin. The exclusion_reason parameter is not properly sanitized before being incorporated into SQL queries, creating an injection point that unauthenticated attackers can exploit to manipulate database queries.

The vulnerability is particularly dangerous because it requires no authentication, making it accessible to any remote attacker who can reach the WordPress installation. The attack can be conducted entirely over the network with low complexity, as no user interaction is required. The primary impact is on confidentiality, allowing attackers to extract sensitive data from the database while integrity and availability remain unaffected.

Root Cause

The root cause of this vulnerability is the insufficient escaping and parameterization of user-supplied input in the exclusion_reason parameter within the class-wp-statistics-exclusion.php file. The plugin fails to properly sanitize this input before incorporating it into SQL queries, violating secure coding practices that mandate the use of prepared statements or proper escaping for all database interactions.

Attack Vector

The attack is conducted remotely over the network without requiring any form of authentication. An attacker can craft malicious HTTP requests containing SQL injection payloads in the exclusion_reason parameter. When processed by the vulnerable plugin code, these payloads manipulate the underlying SQL query structure, allowing the attacker to extract arbitrary data from the WordPress database.

The prerequisite for exploitation is that the "Record Exclusions" feature must be enabled in the plugin settings. When this condition is met, attackers can leverage standard SQL injection techniques such as UNION-based injection, boolean-based blind injection, or time-based blind injection to enumerate and extract database contents.

Detection Methods for CVE-2022-0513

Indicators of Compromise

• Unusual SQL syntax or error messages in web server logs related to WP Statistics plugin endpoints
• Unexpected database queries containing UNION SELECT, SLEEP(), or other SQL injection patterns
• Anomalous requests to WordPress containing encoded SQL characters in POST or GET parameters
• Database access logs showing queries for sensitive tables like wp_users from plugin-related operations

Detection Strategies

• Monitor web application firewall (WAF) logs for SQL injection patterns targeting WordPress installations
• Implement intrusion detection rules to identify SQL injection attempts in the exclusion_reason parameter
• Review WordPress access logs for suspicious request patterns to WP Statistics plugin endpoints
• Deploy database activity monitoring to detect anomalous query patterns

Monitoring Recommendations

• Enable verbose logging on WordPress installations to capture detailed request information
• Configure SIEM alerting for SQL injection indicators specifically targeting WordPress plugins
• Implement file integrity monitoring on WordPress plugin directories to detect unauthorized modifications
• Monitor for bulk data extraction patterns that may indicate successful exploitation

How to Mitigate CVE-2022-0513

Immediate Actions Required

• Update WP Statistics plugin to version 13.1.5 or later immediately
• If immediate patching is not possible, disable the "Record Exclusions" feature in WP Statistics settings
• Review database logs for signs of exploitation and potential data exfiltration
• Consider implementing a Web Application Firewall (WAF) with SQL injection protection rules

Patch Information

Veronalabs has released a security patch addressing this vulnerability. The fix involves proper escaping and parameterization of the exclusion_reason parameter to prevent SQL injection attacks. The patch details can be reviewed in the WordPress Plugin Changeset 2671297.

For additional technical analysis and remediation guidance, refer to the Wordfence security advisory which provides comprehensive details about the vulnerability and the patch.

Workarounds

• Disable the "Record Exclusions" feature in WP Statistics plugin settings to eliminate the attack vector
• Implement server-level input filtering to block SQL injection patterns in requests to WordPress
• Deploy a Web Application Firewall configured with WordPress-specific SQL injection rules
• Restrict access to WordPress administrative functions through IP allowlisting where feasible

# Verify WP Statistics plugin version via WP-CLI
wp plugin list --name=wp-statistics --fields=name,version,status

# Update WP Statistics to the latest patched version
wp plugin update wp-statistics

# Alternatively, disable the plugin until patching is possible
wp plugin deactivate wp-statistics