Contributor PHP Object Injection in Post Duplicator <= 3
Description
Contributor PHP Object Injection in Post Duplicator <= 3
AI Analyst Comment
Remediation
Apply vendor security updates immediately. Monitor for exploitation attempts and review access logs.
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VENDOR: WordPress
PRODUCT: Post Duplicator
AFFECTED_VERSIONS: See vendor advisory for specific affected versions
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Description Summary:
A PHP object injection vulnerability in the Post Duplicator plugin for WordPress allows authenticated contributors to perform unauthorized actions or execute code.
Executive Summary:
A PHP object injection vulnerability in the Post Duplicator plugin allows authenticated contributors to achieve remote code execution, posing a significant risk to site integrity.
Vulnerability Details
CVE-ID: CVE-2026-39474
Affected Software: WordPress Post Duplicator
Affected Versions: See vendor advisory for specific affected versions
Vulnerability: This is a PHP object injection vulnerability originating from improper validation of user-supplied input. It requires an attacker to possess at least 'Contributor' level authentication to trigger the flaw.
Business Impact
Exploitation of this vulnerability allows an attacker to execute arbitrary code, which can result in complete site takeover, unauthorized modification of database content, and potential malware injection. The CVSS score of 8.8 underscores the high risk to the availability and confidentiality of the affected WordPress environment.
Remediation Plan
Immediate Action: Upgrade the Post Duplicator plugin to the latest version as soon as a security update is released by the developer.
Proactive Monitoring: Monitor site activity for unexpected file modifications and review access logs for requests originating from 'Contributor' accounts that deviate from standard usage.
Compensating Controls: Utilize a WAF to filter malicious input payloads and consider disabling the plugin if the functionality is not critical to business operations.
Exploitation Status
Public Exploit Available: false
Analyst Notes: As of June 16, 2026, there is no public information indicating active exploitation of this vulnerability. However, due to the nature of the flaw, the potential for exploitation is high.
Analyst Recommendation
Security teams must treat this vulnerability with high priority. We recommend auditing all sites running the Post Duplicator plugin and applying the vendor's patch immediately upon release to prevent unauthorized system access.