The Email Subscription Popup WordPress plugin before 1.2.20 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as adminCreditsErwan LR (WPScan)WPScanReferenceshttps://wpscan.com/vulnerability/58803934-dbd3-422d-88e7-ebbc5e8c0886
