CVE-2026-8608 Details
Description
The Event Monster – Event Management, Events Calendar, Tickets plugin for WordPress is vulnerable to Insufficient Verification of Data Authenticity in versions up to, and including, 2.1.0. This is due to the capture_payment() AJAX handler (registered via wp_ajax_nopriv_em_capture_payment) trusting client-supplied payment data — including transaction ID, amount, and payment status — without performing any server-side verification against the PayPal API or any other payment gateway, and without nonce or capability checks. This makes it possible for unauthenticated attackers to forge payment records, mark bookings as Completed, and obtain confirmation emails containing valid QR code tickets without making any actual payment.
A vulnerability exists in the Event Monster - Event Management, Events Calendar, Tickets plugin for WordPress, specifically in versions through 2.1.0. The issue arises from the capture_payment() AJAX handler, which accepts client-supplied payment information, such as transaction ID, amount, and payment status, without any server-side validation against the PayPal API or other payment gateways. Additionally, the handler lacks nonce and capability checks. This flaw enables unauthenticated attackers to create fake payment records, mark bookings as completed, and receive confirmation emails with valid QR code tickets, all without making an actual payment.
Users can update to Event Monster version 2.1.1 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 6, 2026CISA-ADP
Assessed Jun 6, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-345 | Insufficient Verification of Data Authenticity | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Event Monster | <= 2.1.0 (semver) |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 6, 2026 | New CVE Received | [email protected] |