4.3
MEDIUM CVSS 3.1
CVE-2026-15398
Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) <= 4.1.22 - Authenticated (Subscriber+) Missing Authorization to Order Completion / Free Ticket Redemption
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.

INFO

Published Date :

Sept. 9, 2026, 8:17 a.m.

Last Modified :

Sept. 9, 2026, 8:17 a.m.

Remotely Exploit :

Yes !
Affected Products

The following products are affected by CVE-2026-15398 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
Solution
Update the Eventin plugin to a version that addresses the authorization bypass vulnerability.
  • Update the Eventin plugin to the latest version.
  • Apply security patches provided by the vendor.
  • Review access controls for event management.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-15398.

URL Resource
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/base/Enqueue/frontend.php#L28
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L440
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L733
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L768
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L926
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/locale/vars.php#L35
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/base/Enqueue/frontend.php#L28
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/core/Order/OrderController.php#L440
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/core/Order/OrderController.php#L733
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/core/Order/OrderController.php#L768
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/core/Order/OrderController.php#L926
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/utils/locale/vars.php#L35
https://plugins.trac.wordpress.org/changeset?reponame=&old=3668637%40wp-event-solution&new=3668637%40wp-event-solution
https://www.wordfence.com/threat-intel/vulnerabilities/id/dd7baa69-88f7-4546-96c8-4829a63d0a99?source=cve
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-15398 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-15398 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-15398 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2026-15398 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by [email protected]

    Sep. 09, 2026

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
    Added CWE CWE-862
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/15xxx/CVE-2026-15398.json">CVE-2026-15398</a>
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/base/Enqueue/frontend.php#L28
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L440
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L733
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L768
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L926
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/locale/vars.php#L35
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/base/Enqueue/frontend.php#L28
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/core/Order/OrderController.php#L440
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/core/Order/OrderController.php#L733
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/core/Order/OrderController.php#L768
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/core/Order/OrderController.php#L926
    Added Reference https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.16/utils/locale/vars.php#L35
    Added Reference https://plugins.trac.wordpress.org/changeset?reponame=&old=3668637%40wp-event-solution&new=3668637%40wp-event-solution
    Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/dd7baa69-88f7-4546-96c8-4829a63d0a99?source=cve
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.