# Event Tickets and Registration <= 5.30.1 - Authenticated (Contributor+) Insecure Direct Object Reference to Arbitrary Ticket and Attendee Deletion

- **ID:** WPSEC-2026-1141
- **Plugin:** Event Tickets and Registration (`event-tickets`), https://wordpress.org/plugins/event-tickets/
- **Affected versions:** all versions before 5.30.2
- **Fixed in:** 5.30.2 (Update to 5.30.2 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 2026-10-16)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/event-tickets
- **Fix released:** 2026-10-15
- **Published:** 2026-10-16
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1141/

## Description

The Event Tickets and Registration plugin for WordPress is vulnerable to Insecure Direct Object Reference via the 'tribe-ticket-delete' AJAX action and the ticket DELETE REST endpoint in all versions up to, and including, 5.30.1, due to the permission check being performed against the user-supplied 'post_id' parameter instead of the post the ticket or attendee actually belongs to. This makes it possible for authenticated attackers, with contributor-level access and above, to delete tickets and attendees attached to posts they are not permitted to edit by supplying the ID of a post they can edit along with another post's ticket or attendee ID.

## References

- https://wpsec.com/vuln/WPSEC-2026-1141/
- https://plugins.svn.wordpress.org/event-tickets/tags/5.30.2/
- https://wordpress.org/plugins/event-tickets/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1141/

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.