TI-2026-11094 Aliases CVE-2026-13039 GHSA-xcc9-4v86-gf8f

Eventin 4.0.26 - 4.1.15 - Missing Authorization to Unauthenticated Payment Bypass via REST API

LOW 30CWE-862Published 2026-07-10 · Updated 2026-07-13

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

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 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00353 29th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Arraytics	Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered)	4.0.26 – 4.1.15	—	No fix listed	CNA

Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) VendorArraytics Affected 4.0.26 – 4.1.15 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:themewinter:eventin::::::::	—	—	Themewinter

cpe:2.3:a:themewinter:eventin:*:*:*:*:*:*:*:* Versions — — ·Themewinter

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-13039
2026-10-03 Alias added: GHSA-xcc9-4v86-gf8f

References

Other 2

TI-2025-30036 WordPress Eventin plugin <= 4.0.26 - Privilege Escalation Vulnerability CVSS 3.1CRITICAL 9.8
TI-2025-29942 WordPress Eventin plugin <= 4.0.26 - Arbitrary File Download Vulnerability CVSS 3.1CRITICAL 9.8
TI-2024-08599 Authorization bypass in Arraytics Timetics – Appointment Booking & Scheduling CVSS 3.1CRITICAL 9.8
TI-2026-41447 WordPress Booktics plugin <= 1.0.21 - PHP Object Injection vulnerability CVSS 3.1CRITICAL 9.8
TI-2024-29512 WordPress Timetics plugin <= 1.0.23 - Broken Access Control vulnerability CVSS 3.1CRITICAL 9.8
TI-2023-25913 WordPress WPCafe plugin <= 2.2.22 - Broken Access Control vulnerability CVSS 3.1CRITICAL 9.8

See all 80 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences