Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
The WP Statistics WordPress plugin is vulnerable to SQL Injection due to insufficient escaping and parameterization of the exclusion_reason parameter found in the ~/includes/class-wp-statistics-exclusion.php file which allows attackers without authentication to inject arbitrary SQL queries to obtain sensitive information, in versions up to and including 13.1.4. This requires the "Record Exclusions" option to be enabled on the vulnerable site.
CWE-89 - SQL Injection
Structured Query Language (SQL) injection attacks are one of the most common types of vulnerabilities. They exploit weaknesses in vulnerable applications to gain unauthorized access to backend databases. This often occurs when an attacker enters unexpected SQL syntax in an input field. The resulting SQL statement behaves in the background in an unintended manner, which allows the possibility of unauthorized data retrieval, data modification, execution of database administration operations, and execution of commands on the operating system.