CVE-2026-8608

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.

PUBLISHED Reserved 2026-05-14 | Published 2026-06-05 | Updated 2026-06-06 | Assigner Wordfence

Problem types

CWE-345 Insufficient Verification of Data Authenticity

Product status

Timeline

Credits

NAKLEH ZEIDAN finder

References

www.wordfence.com/...-cff4-4caa-bbdc-9945a635a1d6?source=cve

plugins.trac.wordpress.org/...s/class-event-monster-ajax.php

plugins.trac.wordpress.org/...s/class-event-monster-ajax.php

plugins.trac.wordpress.org/...s/class-event-monster-ajax.php

plugins.trac.wordpress.org/...-monster&sfp_email=&sfph_mail=

cve.org (CVE-2026-8608)

nvd.nist.gov (CVE-2026-8608)

Download JSON