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 unfilteredhtml 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 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 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 unfilteredhtml capability is disallowed.

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 Cross-Site Scripting attacks even when the unfilteredhtml capability is disallowed (for example in multisite setup)

The EventON WordPress plugin before 2.1.2 lacks authentication and authorization in its eventonicsdownload ajax action, allowing unauthenticated visitors to access private and password protected Events by guessing their numeric id.

The EventON plugin through 3.0.5 for WordPress allows addons/?q= XSS via the search field.