The Events Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 6.4.6.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Pixelite Events Manager allows Reflected XSS.This issue affects Events Manager: from n/a through 6.4.5.

The WP FullCalendar WordPress plugin before 1.5 does not ensure that the post retrieved via an AJAX action is public and can be accessed by the user making the request, allowing unauthenticated attackers to get the content of arbitrary posts, including draft/private as well as password-protected ones.

The Events Manager WordPress plugin before 5.9.8 does not sanitise and escape some search parameter before outputing them in pages, which could lead to Cross-Site Scripting issues

The Events Manager WordPress plugin before 5.9.8 does not sanitise and escape a parameter before using it in a SQL statement, leading to an SQL Injection

The events-manager plugin through 5.9.5 for WordPress (aka Events Manager) is susceptible to Stored XSS due to improper encoding and insertion of data provided to the attribute map_style of shortcodes (locations_map and events_map) provided by the plugin.

The events-manager plugin before 5.1.7 for WordPress has XSS via JSON call links.

The events-manager plugin before 5.5.2 for WordPress has XSS in the booking form.

The events-manager plugin before 5.3.9 for WordPress has XSS in the search form field.

The events-manager plugin before 5.3.6.1 for WordPress has XSS via the booking form and admin areas.