WordPress security changelog
MEDIUM CVE-2026-15398 Deferred

Eventin exposes credentials that let visitors complete unpaid bookings

Eventin through 4.1.22 fails to authorize booking-status changes. Although the advisory initially describes Subscriber access, its documented chain is unauthenticated: frontend pages expose a wp_rest nonce, and the order-creation endpoint returns an order_access_token to callers holding it. Together these reach the privileged update_booking_status branch, letting visitors mark unpaid orders completed, consume ticket inventory, and trigger confirmation emails without paying.

CVE / CNA score 4.3 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce
Plugin slug
wp-event-solution
Affected
<= 4.1.22
Safe version
4.1.24
Published
Sep 09, 2026
Weakness
CWE-862 — Missing Authorization

This CVE was published Sep 09, 2026 and is one of 45 known issues for this plugin.

What to do

Update, patch or deactivate.

The official author release notes confirm remediation by 4.1.24; this does not establish that every intervening release was affected. Update the affected edition to 4.1.24 or a later maintained release on its supported branch. If in doubt, contact Fused or your hosting vendor. Official author release notes: https://wordpress.org/plugins/wp-event-solution/.

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.

Source record

Technical description

The Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.1.22. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to bypass payment for paid events, fraudulently mark orders as completed, deplete ticket inventory, and trigger confirmation emails for tickets never purchased. This is exploitable by unauthenticated attackers because the wp_rest nonce is publicly emitted on every frontend page, and the order creation endpoint mints and returns an order_access_token to any caller possessing that nonce — giving unauthenticated users all credentials required to reach the privileged update_booking_status branch.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

Primary and upstream sources