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CVE-2021-4387

HIGH 8.8 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:H/I:H/A:H

Description

The Opal Estate plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.6.11. This is due to missing or incorrect nonce validation on the opalestate_set_feature_property() and opalestate_remove_feature_property() functions. This makes it possible for unauthenticated attackers to set and remove featured properties via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected WordPress components

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

  • wpopal Opal Estate — Up to and including 1.6.11
  • wpopal opal_estate — Up to and including 1.6.11

References

  • blog.nintechnet.com https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/ Third Party Advisory
  • blog.nintechnet.com https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/ Third Party Advisory
  • blog.nintechnet.com https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/ Third Party Advisory
  • blog.nintechnet.com https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/ Third Party Advisory
  • blog.nintechnet.com https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/ Third Party Advisory
  • blog.nintechnet.com https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/ Third Party Advisory
  • blog.nintechnet.com https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/ Exploit, Third Party Advisory
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/opal-estate/trunk/inc/ajax-functions.php#L177 Not Applicable
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/2645899c-2b6b-48bd-8f33-2a837a951c5e?source=cve Third Party Advisory
  • nvd.nist.gov Official NVD record