---
id: CVE-2026-13039
title: >-
  The Eventin – Event Calendar, Event Registration, Tickets & Booking (AI
  Powered) plugin for WordPress is vulnerable to authorization bypass due to a
  regression in versions from 4.0.26 up to and including 4.1.15
summary: >-
  The Eventin – Event Calendar, Event Registration, Tickets & Booking (AI
  Powered) plugin for WordPress is vulnerable to authorization bypass due to a
  regression in versions from 4.0.26 up to and including 4.1.15. This is due to
  the plugin…
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
published: '2026-07-10'
updated: '2026-07-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-13039'
references:
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3600977%40wp-event-solution&new=3600977%40wp-event-solution
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/84a5348a-a307-4db4-83b6-08682282a4b8?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00353
epssPercentile: 0.26245
ingestedAt: '2026-07-11T20:15:26.813Z'
---

## Overview

The Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) plugin for WordPress is vulnerable to authorization bypass due to a regression in versions from 4.0.26 up to and including 4.1.15. This is due to the plugin not properly verifying that a user is authorized to perform an action in the payment_complete() function of PaymentController.php. This makes it possible for unauthenticated attackers to mark unpaid ticket orders as completed by submitting a fabricated SureCart checkout ID or FluentCart cart hash, granting themselves paid event access, QR-code attendee tickets, and order confirmation emails without making any real payment. The wp_rest nonce required to reach the vulnerable endpoint is embedded in every public event page, meaning no WordPress session or credentials are needed to obtain it. This vulnerability represents a regression — the same function and endpoint were previously patched but the fix did not persist through subsequent releases.

## Remediation

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