Output validation vulnerability in WP Gravity Forms Keap/Infusionsoft 1.2.3

The WordPress plugin called WP Gravity Forms Keap/Infusionsoft is not secure and can be hacked by unauthenticated attackers. This vulnerability allows them to insert a type of code called PHP Object, which can give them access to sensitive information or allow them to delete files on the website. However, this vulnerability only affects sites that have another plugin or theme with a similar type of code.