The Groundhogg plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.7.9.8. This is due to missing nonce validation on the 'enable_safe_mode' function. This makes it possible for unauthenticated attackers to enable safe mode, which disables all other plugins, via a forged request if they can successfully trick an administrator into performing an action such as clicking on a link. A warning message about safe mode is displayed to the admin, which can be easily disabled.

The Groundhogg plugin for WordPress is vulnerable to unauthorized access of data and modification of data due to a missing capability check on the 'ajax_upload_file' function in versions up to, and including, 2.7.9.8. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload a file to the contact, and then lists all the other uploaded files related to the contact.

The Groundhogg plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'submit_ticket' function in versions up to, and including, 2.7.9.8. This makes it possible for authenticated attackers to create a support ticket that sends the website's data to the plugin developer, and it is also possible to create an admin access with an auto login link that is also sent to the plugin developer with the ticket. It only works if the plugin is activated with a valid license.

The Groundhogg plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'check_license' functions in versions up to, and including, 2.7.9.8. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to change the license key and support license key, but it can only be changed to a valid license key.

The WordPress CRM, Email & Marketing Automation for WordPress | Award Winner — Groundhogg WordPress plugin before 2.7.9.4 does not properly sanitise and escape a parameter before using it in a SQL statement, leading to a SQL injection exploitable by high privilege users such as admins

The groundhogg plugin before 1.3.5 for WordPress has wp-admin/admin-ajax.php?action=bulk_action_listener remote code execution.