Essential Blocks <= 4.2.0 - Unauthenticated PHP Object Injection via queries

Deserialization of Untrusted Data
CVE CVE-2023-4386
CVSS High (8.1)
Publicly Published September 13, 2023
Last Updated January 22, 2024
Researcher Marco Wotschka
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.

References

2 affected software package

Software Type Plugin
Software Slug essential-blocks-pro (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 1.1.0
Patched Version
  • 1.1.1
Software Type Plugin
Software Slug essential-blocks (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 4.2.0
Patched Version
  • 4.2.1
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