The Simple Download Monitor WordPress plugin before 3.9.5 does not escape the 1) sdm_active_tab GET parameter and 2) sdm_stats_start_date/sdm_stats_end_date POST parameters before outputting them back in attributes, leading to Reflected Cross-Site Scripting issues
https://wpscan.com/vulnerability/ef9ae513-6c29-45c2-b5ae-4a06a217c499