The Gift Cards (Gift Vouchers and Packages) WordPress Plugin, version <= 4.3.1, is affected by an unauthenticated SQL injection vulnerability in the template parameter in the wpgvdoajaxvoucherpdfsavefunc action.
The Gift Vouchers plugin through 2.0.1 for WordPress allows SQL Injection via the templateid parameter in a wp-admin/admin-ajax.php wpgvdoajaxfronttemplate request.