Insufficient Data Authenticity Verification in Event Management Plugin for WordPress by Event Monster
CVE-2026-8608

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Event Monster – Event Manager, Ticket Booking & Registration
Vendor
CVE Published:
5 June 2026

What is CVE-2026-8608?

The Event Monster plugin for WordPress is prone to an issue where client-supplied payment data, including transaction ID, amount, and payment status, is trusted without adequate server-side verification. Specifically, the capture_payment() AJAX handler fails to validate this data against the PayPal API or any other payment processors, increasing the risk of unauthorized access to payment systems. As a result, unauthenticated attackers can maliciously create payment records, mark bookings as completed, and receive confirmation emails with valid QR code tickets, all without making legitimate payments.

Affected Version(s)

Event Monster – Event Manager, Ticket Booking & Registration 0 <= 2.1.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/event-monster/...
https://plugins.trac.wordpress.org/browser/event-monster/...

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

NAKLEH ZEIDAN
.