---
id: CVE-2026-12956
title: >-
  The WP Event Solution (Eventin) plugin for WordPress is vulnerable to Missing
  Authorization in versions up to, and including, 4.1.22 via the create_item()
  handler for the /wp-json/eventin/v2/orders REST endpoint
summary: >-
  The WP Event Solution (Eventin) plugin for WordPress is vulnerable to Missing
  Authorization in versions up to, and including, 4.1.22 via the create_item()
  handler for the /wp-json/eventin/v2/orders REST endpoint. The endpoint's
  create_it…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-862
vendor: arraytics
product: 'Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce'
affected:
  - eventin_event_calendar_tickets_registration_booking_woocommerce <= 4.1.22
published: '2026-09-09'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T15:33:47.627'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-12956'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L1325
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L413
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L733
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/helper.php#L4558
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/locale/vars.php#L35
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3668637%40wp-event-solution&new=3668637%40wp-event-solution
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/5e87a9ac-e7c6-4622-b3e5-6e17e7664317?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-09T13:54:47.100590Z'
ingestedAt: '2026-09-09T02:57:45.160Z'
epss: 0.00238
epssPercentile: 0.13326
---

## Overview

The WP Event Solution (Eventin) plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 4.1.22 via the create_item() handler for the /wp-json/eventin/v2/orders REST endpoint. The endpoint's create_item_permissions_check() function only verifies a wp_rest nonce (which is leaked to every visitor through the etn-public script's localized_data_obj on every frontend page) and accepts a user-supplied 'status' value in prepare_item_for_database() with no whitelist validation. This makes it possible for unauthenticated attackers to create etn-order posts with status='completed' that are counted as sold by etn_get_sold_tickets_by_event(); because the auto-cleanup wp_schedule_single_event() in create_item() only fires for status='pending' orders, the forged completed orders persist indefinitely and exhaust ticket inventory.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.