Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered): A security weakness
Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is 4.0.26 through 4.1.15.
- Component
- Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered)
- Affected
- 4.0.26 through 4.1.15
- Safe version
> 4.1.15- Published
- Jul 10, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Jul 10, 2026 and is one of 1 known issue for this plugin.
Update, patch or deactivate.
Update Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) to a release after 4.1.15, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical 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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N