SureForms <= 2.5.2 - Unauthenticated Payment Amount Validation Bypass via form_id

The SureForms plugin for WordPress is vulnerable to payment amount validation bypass in versions up to, and including, 2.5.2. The createpaymentintent AJAX handler checks if $formid 0 && !empty$blockid before calling validatepaymentamount. By sending formid=0 the default intval of a missing/zero...