Event Monster <= 2.1.0 — Unauthenticated Insufficient Verification of Data Authenticity to Payment Bypass via em_capture_payment AJAX Action
CVE-2026-8608Published · Updated Action summary
Affected: ≤2.1.0Update to 2.2.0 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Event Monster – Event Manager, Event Booking, Event Ticket & Registration event-monster
- Affected≤ 2.1.0
- Patched in2.2.0
Update to 2.2.0 or newer.
You are affected if you run ≤ 2.1.0. Version 2.2.0 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Event Monster – Event Manager, Event Booking, Event Ticket & Registration.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 2.2.0, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Event Monster – Event Manager, Event Booking, Event Ticket & Registration to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to NAKLEH ZEIDAN.
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Event Monster – Event Manager, Event Booking, Event Ticket & Registration
All 8| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.3 | Information Exposure Via Visitors List Export ≤1.4.3Update to 1.4.4 | CVE-2024-11396 | |
| Medium5.3 | Unauthenticated Information Exposure ≤1.4.3Update to 1.4.4 | CVE-2024-5059 | |
| High7.5 | Authenticated(Contributor+) PHP Object Injection via Custom Meta ≤1.3.9Update to 1.4.0 | CVE-2024-1895 | |
| Medium4.4 | Authenticated (Administrator+) Stored Cross-Site Scripting via settings ≤1.4.6Update to 2.0.0 | CVE-2023-47525 | |
| High7.2 | Authenticated (Administrator+) SQL Injection ≤1.2.0Update to 1.2.1 | CVE-2022-3720 |
- Medium5.3Information Exposure Via Visitors List Export
≤1.4.3Update to 1.4.4
- Medium5.3Unauthenticated Information Exposure
≤1.4.3Update to 1.4.4
- High7.5Authenticated(Contributor+) PHP Object Injection via Custom Meta
≤1.3.9Update to 1.4.0
- Medium4.4Authenticated (Administrator+) Stored Cross-Site Scripting via settings
≤1.4.6Update to 2.0.0
- High7.2Authenticated (Administrator+) SQL Injection
≤1.2.0Update to 1.2.1
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.