CVE-2019-20455
Gateways/Gateway.php in Heartland & Global Payments PHP SDK before 2.0.0 does not enforce SSL certificate validations.
Date published : 2020-02-14
https://github.com/globalpayments/php-sdk/compare/1.3.3…2.0.0
https://github.com/globalpayments/php-sdk/releases/tag/2.0.0