Language: PHP
Label: vulnerable
CWE: CWE-89 \u2014 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.

Code:
    public function exists($uuid)
    {
        return (bool) $this->db->fetchOne('SELECT uuid FROM ' . self::TABLE_NAME . ' where uuid = ?', [$uuid]);
    }