The EventON PRO - WordPress Virtual Event Calendar Plugin plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 4.6.8. This is due to missing or incorrect nonce validation on the admin_test_email function. This makes it possible for unauthenticated attackers to send test emails to arbitrary email addresses via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The EventON WordPress plugin before 2.2.17 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Cross-Site Scripting attacks even when unfiltered_html is disallowed.

The EventON WordPress plugin before 4.4.1 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

The EventON-RSVP WordPress plugin before 2.9.5 does not sanitise and escape some parameters before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

The EventON Premium WordPress plugin before 4.5.6, EventON WordPress plugin before 2.2.8 do not have authorisation in an AJAX action, and does not ensure that the post to be updated belong to the plugin, allowing unauthenticated users to update arbitrary post metadata.

The EventON WordPress plugin through 4.5.8, EventON WordPress plugin before 2.2.7 do not have authorisation in some AJAX actions, allowing unauthenticated users to update virtual events settings, such as meeting URL, moderator, access details etc

The EventON WordPress plugin before 4.5.5, EventON WordPress plugin before 2.2.7 do not have authorisation in an AJAX action, allowing unauthenticated users to retrieve the settings of arbitrary virtual events, including any meeting password set (for example for Zoom)

The EventON WordPress plugin before 4.5.5, EventON WordPress plugin before 2.2.7 do not have authorisation in an AJAX action, allowing unauthenticated users to retrieve email addresses of any users on the blog

The EventON WordPress plugin before 4.5.5, EventON WordPress plugin before 2.2.7 do not properly sanitise and escape a parameter before outputting it back in pages, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

The EventON WordPress plugin before 2.2 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored HTML Injection attacks even when the unfiltered_html capability is disallowed.