The Contest Gallery WordPress plugin before 19.1.5.1, Contest Gallery Pro WordPress plugin before 19.1.5.1 do not escape the upload[] POST parameter before concatenating it to an SQL query in get-data-create-upload-v10.php. This may allow malicious users with at least author privilege to leak sensitive information from the site's database.
https://wpscan.com/vulnerability/35b0126d-9293-4e64-a00f-0903303f960a