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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

Quick assessment

Affected
arraytics Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件 The Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) 存在授权绕过漏洞，影响所有包含 4.1.22 及更早的版本。该漏洞源于插件未能正确验证用户是否被授权执行特定操作。这使得拥有订阅者（Subscriber）级别或更高权限的已认证攻击者可以绕过付费活动的支付流程，擅自将订单标记为已完成，耗尽票务库存，并触发针对从未购买的门票的确认邮件。该漏洞也可被未认证攻击者利用，因为 认证令牌（n

CVSS 4.3 · Medium
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I. Basic Information for CVE-2026-15398

Vulnerability Information
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Vulnerability Title
Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) <= 4.1.22 - Authenticated (Subscriber+) Missing Authorization to Order Completion / Free Ticket Redemption
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
arraytics Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce 0 ~ 4.1.22 -

II. Public POCs for CVE-2026-15398

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III. Intelligence Information for CVE-2026-15398

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Patches & Fixes for CVE-2026-15398 (1)

Other References for CVE-2026-15398 (1)

Other References for CVE-2026-15398 (4)

Same Patch Batch · arraytics · 2026-09-09 · 5 CVEs total

CVE-2026-15667 7.5 HIGH Eventin <= 4.1.22 - Authenticated (Contirbutor+) Local File Inclusion via 'event_layout' P
CVE-2026-15406 7.5 HIGH Eventin <= 4.1.22 - Authenticated (Custom+) Local File Inclusion via 'event_layout' Parame
CVE-2026-11821 5.4 MEDIUM Eventin <= 4.1.17 - Missing Authorization to Authenticated (Subscriber+) Notification Flow
CVE-2026-12956 5.3 MEDIUM Eventin <= 4.1.22 - Missing Authorization to Unauthenticated Arbitrary Order Creation and

IV. Related Vulnerabilities

Same product: Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce
Same vendor: arraytics
Same weakness: CWE-862

V. Comments for CVE-2026-15398

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