# Event Tickets and Registration <= 5.31.0 - Unauthenticated Sensitive Information Exposure via Attendee Archive REST Endpoint Filters

- **ID:** WPSEC-2026-3097
- **Plugin:** Event Tickets and Registration (`event-tickets`), https://wordpress.org/plugins/event-tickets/
- **Affected versions:** from 4.8 before 5.31.1
- **Fixed in:** 5.31.1 (Update to 5.31.1 or later.)
- **Severity:** Medium 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
- **Weakness:** CWE-200
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-13)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/event-tickets
- **Fix released:** 2026-11-12
- **Published:** 2026-11-13
- **URL:** https://wpsec.com/vuln/WPSEC-2026-3097/

## Description

The Event Tickets and Registration plugin for WordPress is vulnerable to Sensitive Information Exposure via the attendees archive REST endpoint (/wp-json/tribe/tickets/v1/attendees) in all versions up to, and including, 5.31.0, due to the endpoint applying the email search, order ID, order status, check-in, price and attendee information filters, and slug ordering, to requests that do not have manage access. This makes it possible for unauthenticated attackers to use these filters as a yes/no oracle against the publicly listed attendees, inferring attendee email addresses, order IDs, prices paid and check-in state that the public response does not show.

## References

- https://wpsec.com/vuln/WPSEC-2026-3097/
- https://plugins.svn.wordpress.org/event-tickets/tags/5.31.1/
- https://wordpress.org/plugins/event-tickets/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-3097/

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.