Description

WordPress Plugin Essential Blocks-Page Builder Gutenberg Blocks, Patterns & Templates is prone to multiple vulnerabilities that lets remote attackers inject and execute arbitrary code because the application fails to sanitize user-supplied input before being passed to the unserialize() PHP function. Attackers can possibly exploit these issues to execute arbitrary PHP code within the context of the affected webserver process. WordPress Plugin Essential Blocks-Page Builder Gutenberg Blocks, Patterns & Templates version 4.2.0 is vulnerable; prior versions may also be affected.

Remediation

Update to plugin version 4.2.1 or latest

References

https://www.wordfence.com/blog/2023/09/two-php-object-injection-vulnerabilities-fixed-in-essential-blocks/

https://www.wordfence.com/threat-intel/vulnerabilities/detail/essential-blocks-420-unauthenticated-php-object-injection-via-queries

https://www.wordfence.com/threat-intel/vulnerabilities/detail/essential-blocks-420-unauthenticated-php-object-injection-via-products

https://plugins.svn.wordpress.org/essential-blocks/trunk/readme.txt

Related Vulnerabilities

EspoCRM Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2025-32789)

Liferay DXP Inefficient Regular Expression Complexity Vulnerability (CVE-2022-42124)

TYPO3 Improper Input Validation Vulnerability (CVE-2011-4904)

PHP Out-of-bounds Read Vulnerability (CVE-2016-9935)

WordPress Plugin WP-Forum Multiple SQL Injection Vulnerabilities (2.3)

Severity

High

Classification

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Tags

Missing Update CWE-915 CVE-2023-4386 CVE-2023-4402