arraytics Eventin Plugin up to 4.1.15 on WordPress PaymentController PaymentController.php payment_complete checkout_id/cart_hash authorization

Summaryinfo

A vulnerability marked as critical has been reported in arraytics Eventin Plugin up to 4.1.15. Affected by this vulnerability is the function payment_complete of the file PaymentController.php of the component PaymentController. Performing a manipulation of the argument checkout_id/cart_hash results in authorization. This vulnerability is cataloged as CVE-2026-13039. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in arraytics Eventin Plugin up to 4.1.15. It has been classified as critical. This affects the function payment_complete of the file PaymentController.php of the component PaymentController. The manipulation of the argument checkout_id/cart_hash with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-13039 since 06/23/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

By approaching the search of inurl:PaymentController.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 4.1.16 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• arraytics

Name

• Eventin Plugin

Version

• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6
• 4.1.7
• 4.1.8
• 4.1.9
• 4.1.10
• 4.1.11
• 4.1.12
• 4.1.13
• 4.1.14
• 4.1.15

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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