The Contest Gallery WordPress plugin before 19.1.5.1, Contest Gallery Pro WordPress plugin before 19.1.5.1 do not escape the option_id GET parameter before concatenating it to an SQL query in export-images-data.php. This may allow malicious users with at least author privilege to leak sensitive information from the site's database.
https://wpscan.com/vulnerability/e1320c2a-818d-4e91-8dc9-ba95a1dc4377