Membership Add-on for iThemes Exchange before 1.3.0 for WordPress has XSS via add_query_arg() and remove_query_arg().
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Manual Purchases Add-on for iThemes Exchange before 1.1.0 for WordPress has XSS via add_query_arg() and remove_query_arg().
Invoices Add-on for iThemes Exchange before 1.4.0 for WordPress has XSS via add_query_arg() and remove_query_arg().
Easy US Sales Taxes Add-on for iThemes Exchange before 1.1.0 for WordPress has XSS via add_query_arg() and remove_query_arg().
Easy EU Value Added (VAT) Taxes Add-on for iThemes Exchange before 1.2.0 for WordPress has XSS via add_query_arg() and remove_query_arg().
Easy Canadian Sales Taxes Add-on for iThemes Exchange before 1.1.0 for WordPress has XSS via add_query_arg() and remove_query_arg().
Custom URL Tracking Add-on for iThemes Exchange before 1.1.0 for WordPress has XSS via add_query_arg() and remove_query_arg().
Authorize.net Add-on for iThemes Exchange before 1.1.0 for WordPress has XSS via add_query_arg() and remove_query_arg().
iThemes Exchange before 1.12.0 for WordPress has XSS via add_query_arg() and remove_query_arg().