The WPForms Google Sheet Connector WordPress plugin before 3.4.6, gsheetconnector-wpforms-pro WordPress plugin through 3.4.6 does not escape a parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin
https://wpscan.com/vulnerability/79a56359-f7e8-4c8c-b0aa-6300f5d57880