CVE-2026-13039: arraytics eventin – event calendar, event registration, tickets & booking (ai powered) Missing Authorization

Vulnerability summary

CVE-2026-13039 is a medium (CVSS 5.3) Missing Authorization vulnerability in arraytics eventin – event calendar, event registration, tickets & booking (ai powered). EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.4% of scored vulnerabilities.

Timeline

1. 10-07-2026
   PublishedVulnerability first disclosed.
2. 13-07-2026
   Last modifiedVulnerability information updated.

Description

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.

• CWE-862Missing AuthorizationThe product does not perform an authorization check when an actor attempts to access a resource or perform an action.