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OpenAdvisories
Medium · 4.3 CVE-2021-4404 EUVD-2021-34231GHSA-6268-vp8g-p7c5

Event Espresso 4 Decaf <= 4.10.11 - Cross-Site Request Forgery Bypass

Published Jul 1, 2023 · Updated Apr 8, 2026 · Assigned by Wordfence

Description

The Event Espresso 4 Decaf plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.10.11. This is due to missing or incorrect nonce validation on the ajaxHandler() function. This makes it possible for unauthenticated attackers to op into notifications via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

VendorProductAffectedFixed
eventespresso Event Espresso – Event Registration & Ticketing Sales ≤ 4.10.11 —

References