CVE-2026-16067

The Event Booking Manager for WooCommerce WordPress plugin before version 5.3.7 does not properly verify authorization on the object being modified when quick-editing events, only checking a global capability. Users with the Contributor role and above can modify the title and publication status of arbitrary posts and pages on the site, including content they do not own.

The Event Booking Manager for WooCommerce WordPress plugin before version 5.3.7 does not sanitise or escape event timeline content submitted by users with post-editing access before storing it and rendering it on the public event page. Users with the Author role and above can inject arbitrary JavaScript that executes in the browser of any visitor viewing the event, including administrators.

The Event Booking Manager for WooCommerce WordPress plugin before version 5.3.7 does not prevent the deserialization of user-controlled input in some of its event content fields. Users with Contributor-level access and above can inject PHP objects. No POP chain is present in the plugin itself, but if one is present via another installed plugin, this could lead to actions such as arbitrary file deletion, sensitive data retrieval, or remote code execution. This is an incomplete fix of earlier object-injection advisories.

The Event Booking Manager for WooCommerce plugin up to version 5.3.7 allows authorization bypass. Lack of proper permission checks allows authenticated attackers with contributor access to modify global payment settings, including WooCommerce payment enablement, cart behavior, and login requirements.