# Events Manager – Calendar, Bookings, Tickets, Appointments and more! <= 7.4.12 - Authenticated (Contributor+) Insecure Direct Object Reference to Ticket Overwrite via Event Save

- **ID:** WPSEC-2026-2639
- **Plugin:** Events Manager – Calendar, Bookings, Tickets, Appointments and more! (`events-manager`), https://wordpress.org/plugins/events-manager/
- **Affected versions:** all versions before 7.4.13
- **Fixed in:** 7.4.13 (Update to 7.4.13 or later.)
- **Severity:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-639
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-06)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/events-manager
- **Fix released:** 2026-11-05
- **Published:** 2026-11-06
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2639/

## Description

The Events Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference via the 'em_tickets' ticket data submitted when saving an event in all versions up to, and including, 7.4.12. This is due to EM_Tickets::get_post() keeping the request-supplied 'ticket_id' on a new EM_Ticket when that ID does not belong to the event being saved. EM_Ticket::save() then updates that ticket row and moves it to the attacker's event. This makes it possible for authenticated attackers, with Contributor-level access and above, to overwrite and take over tickets that belong to other users' events.

## References

- https://wpsec.com/vuln/WPSEC-2026-2639/
- https://plugins.svn.wordpress.org/events-manager/tags/7.4.13/
- https://wordpress.org/plugins/events-manager/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2639/

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.