The Registrations for the Events Calendar WordPress plugin before 2.7.6 does not sanitise and escape the eventid in the rtecsendunregisterlink AJAX action (available to both unauthenticated and authenticated users) before using it in a SQL statement, leading to an unauthenticated SQL injection.

The Registrations for the Events Calendar WordPress plugin before 2.12.4 does not sanitise and escape some parameters when accepting event registrations, which could allow unauthenticated users to perform Cross-Site Scripting attacks.

The Events Calendar WordPress plugin before 6.2.8.1 discloses the content of password protected posts to unauthenticated users via a crafted request

The events-calendar-pro WordPress plugin before 6.4.0.1, The Events Calendar WordPress plugin before 6.4.0.1 does not prevent users with at least the contributor role from leaking details about events they shouldn't have access to. (e.g. password-protected events, drafts, etc.)

The Registrations for the Events Calendar WordPress plugin before 2.13.4 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfilteredhtml capability is disallowed (for example in multisite setup).

The Registrations for the Events Calendar WordPress plugin before 2.7.5 does not escape the v parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting

The Registrations for the Events Calendar WordPress plugin before 2.7.10 does not escape the qtype parameter before outputting it back in an attribute in the settings page, leading to a Reflected Cross-Site Scripting

The EventCalendar WordPress plugin before 1.1.51 does not escape some user input before outputting it back in attributes, leading to Reflected Cross-SIte Scripting issues

The the-events-calendar plugin before 4.8.2 for WordPress has XSS via the tribepaged URL parameter.

The Events Calendar WordPress plugin before 6.8.2.1 is missing access checks in the REST API, allowing for unauthenticated users to access information about password protected events.

The Events Calendar WordPress plugin before 6.6.4 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfilteredhtml capability is disallowed (for example in multisite setup).

Cross-site scripting (XSS) vulnerability in the Event Import page (import-eventbrite-events.php) in the Modern Tribe Eventbrite Tickets plugin before 3.10.2 for WordPress allows remote attackers to inject arbitrary web script or HTML via the "error" parameter to wp-admin/edit.php.

The EventCalendar WordPress plugin before 1.1.51 does not have proper authorisation and CSRF checks in the addcalendarevent AJAX actions, allowing users with a role as low as subscriber to create events