The request_list_request AJAX call of the Car Seller - Auto Classifieds Script WordPress plugin through 2.1.0, available to both authenticated and unauthenticated users, does not sanitize, validate or escape the order_id POST parameter before using it in a SQL statement, leading to a SQL injection issue.
View the template here CVE-2021-24285.yaml
References:
https://nvd.nist.gov/vuln/detail/CVE-2021-24285