Form post to external url through an aura component embedded in community page

Question

Is it possible to execute a form post to an external site from an aura component that is exposed in a community page?

Our aura component looks like this

<aura:component implements="forceCommunity:availableForAllPageTypes" access="global">
    <aura:handler name="init" value="{!this}" action="{!c.init}" />
    <lightning:flow aura:id="flowData" onstatuschange="{!c.handleStatusChange}" />

    <form name="paymentForm" aura:id="paymentForm" action="https://..." method="POST">
        <input type="hidden" name="ccId" value="123" />
    </form>
</aura:component>

and we'd like to do something like this; set our form variables using the output variables from the flow before submit

handleStatusChange : function (component, event) {
    if(event.getParam("status") === "FINISHED") {
        var outputVariables = event.getParam("outputVariables");
        //set form variable using output variables from flow
        component.find("paymentForm").submit();
    }
 }

Answer 1

Changing the submit to this works:

component.find("paymentForm").getElement().submit();