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

Ruby on Rails Deserialization of Untrusted Data Vulnerability (CVE-2018-16476)

WordPress Plugin Master Slider-WordPress Responsive Touch Slider Unspecified Vulnerability (2.18.2)

PHP Improper Input Validation Vulnerability (CVE-2006-6383)

WordPress Plugin Easy Property Listings Cross-Site Scripting (3.3.5.8)

WordPress Plugin ReFlex Gallery Cross-Site Scripting (3.1.4)

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