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CVE-2021-4404

MEDIUM 4.3 CVSS 3.1
Published
July 1, 2023
Last modified
June 17, 2026
NVD status
Modified
Reported by
security@wordfence.com
Weakness
CWE-352
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

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 WordPress components

  • Event Espresso – Event Registration & Ticketing Sales Plugin · event-espresso-decaf
    Confirmed match Active
    Up to and including 4.10.11
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • eventespresso Event Espresso – Event Registration & Ticketing Sales — Up to and including 4.10.11
  • eventespresso event_espresso_4_decaf — Up to and including 4.10.11

References

  • blog.nintechnet.com https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/ Not Applicable
  • blog.nintechnet.com https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/ Not Applicable
  • blog.nintechnet.com https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/ Not Applicable
  • blog.nintechnet.com https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/ Not Applicable
  • blog.nintechnet.com https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/ Not Applicable
  • blog.nintechnet.com https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/ Not Applicable
  • blog.nintechnet.com https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/ Third Party Advisory
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/2554360/event-espresso-decaf/trunk/core/domain/services/pue/Stats.php Patch
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/89d3a9da-2496-4f75-ad8f-65629f198fe5?source=cve Third Party Advisory
  • nvd.nist.gov Official NVD record