vulnerability
WordPress Plugin: essential-blocks: CVE-2023-4386: Deserialization of Untrusted Data
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:M/Au:N/C:C/I:C/A:C) | Sep 13, 2023 | May 15, 2025 | Apr 30, 2026 |
Severity
9
CVSS
(AV:N/AC:M/Au:N/C:C/I:C/A:C)
Published
Sep 13, 2023
Added
May 15, 2025
Modified
Apr 30, 2026
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.
Solution
essential-blocks-plugin-cve-2023-4386
References
Rapid7 Labs
2026 Global Threat Landscape Report
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