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CVE-2023-4386

HIGH 8.1 CVSS 3.1
Published
October 20, 2023
Last modified
June 17, 2026
NVD status
Modified
Reported by
security@wordfence.com
Weakness
CWE-502
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

The Essential Blocks plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 4.2.0 via deserialization of untrusted input in the get_posts function. This allows unauthenticated attackers to inject a PHP Object. No POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

Affected WordPress components

  • Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns Plugin · essential-blocks
    Confirmed match Active
    Up to and including 4.2.0; Up to and including 1.1.0
    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

  • wpdevteam Essential Blocks Pro — Up to and including 1.1.0
  • wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns — Up to and including 4.2.0
  • wpdeveloper essential_blocks — Up to and including 4.2.0

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/essential-blocks/trunk/includes/API/PostBlock.php?rev=2950425#L30 Product
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/af468f83-d6ad-474c-bf7f-c4eeb6df1b54?source=cve Third Party Advisory
  • nvd.nist.gov Official NVD record