# WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce <= 3.4.1 - Authenticated (Subscriber+) Insecure Direct Object Reference to Organizer and Venue Takeover via 'event_organizer_ids' and 'event_venue_ids'

- **ID:** WPSEC-2026-2207
- **Plugin:** WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce (`wp-event-manager`), https://wordpress.org/plugins/wp-event-manager/
- **Affected versions:** all versions before 3.4.2
- **Fixed in:** 3.4.2 (Update to 3.4.2 or later.)
- **Severity:** Medium 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N)
- **Weakness:** CWE-639
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-03)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/wp-event-manager
- **Fix released:** 2026-10-30
- **Published:** 2026-11-03
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2207/

## Description

The WP Event Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference via the 'event_organizer_ids' and 'event_venue_ids' parameters of the event submission form in all versions up to, and including, 3.4.1, due to missing validation of the submitted organizer and venue IDs. The plugin assigned each referenced post to the submitting user and set it to published without checking its post type or owner. This makes it possible for authenticated attackers, with subscriber-level access and above, to take over other users' organizers and venues, and to reassign and publish arbitrary posts such as other users' drafts.

## References

- https://wpsec.com/vuln/WPSEC-2026-2207/
- https://plugins.svn.wordpress.org/wp-event-manager/tags/3.4.2/
- https://wordpress.org/plugins/wp-event-manager/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2207/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.