CVE-2026-121636 Details
Description
The Quick Event Manager WordPress plugin before 9.19 does not verify the authenticity of PayPal payment notifications before marking event registrations as paid, which could allow unauthenticated attackers to mark registrations as paid without making a payment.
A vulnerability exists in the Quick Event Manager WordPress plugin in versions prior to 9.19. The issue arises because the plugin does not properly verify the authenticity of PayPal payment notifications before marking event registrations as paid. This flaw could enable unauthenticated attackers to falsely mark registrations as paid without actually making a payment.
Users are advised to update the Quick Event Manager WordPress plugin to version 9.19 or later.
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 Nov 6, 2026CISA-ADP
Assessed Nov 6, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/04b181e1-639c-476f-b66b-2a073bf36829/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-345 | Insufficient Verification of Data Authenticity | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Quick Event Manager | >= 9.9.5, <= 9.18 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 6, 2026 | CVE Modified | CISA-ADP |
| Nov 6, 2026 | New CVE Received | [email protected] |