CVE-2026-4244
Received Received - Intake

Post Duplicator WordPress Plugin Unauthorized Post Duplication Vulnerability

Publication date: 2026-08-22

Last updated on: 2026-08-22

Assigner: Wordfence

Description
The Post Duplicator plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `duplicate_post()` function in all versions up to, and including, 3.0.11. This is due to the function not verifying that the user has `edit_others_posts` capability before accepting a `selectedAuthorId` parameter via the `duplicate-post` REST endpoint. This makes it possible for authenticated attackers, with Contributor-level access and above, to create duplicated posts attributed to any user, including administrators.

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Meta Information

Published
2026-08-22
Last Modified
2026-08-22
Generated
2026-08-22
AI Q&A
2026-08-22
EPSS Evaluated
N/A
NVD
CVE-2026-4244
EUVD
EUVD-2026-64275

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wp_duplicator post_duplicator to 3.0.11 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

The Post Duplicator WordPress plugin has a vulnerability where the duplicate_post() function lacks a capability check. This allows authenticated users with Contributor access or higher to duplicate posts and assign them to any user, including administrators, via the duplicate-post REST endpoint by manipulating the selectedAuthorId parameter.

Detection Guidance

Check WordPress sites using the Post Duplicator plugin for unauthorized post duplications or unexpected author changes. Review REST API logs for duplicate-post endpoint requests with modified selectedAuthorId parameters.

Impact Analysis

An attacker could create duplicate posts under another user's name, potentially spreading misinformation or malicious content while appearing to be from a trusted user. This could damage reputation or lead to unauthorized content being published on your site.

Compliance Impact

This vulnerability allows authenticated attackers to create duplicated posts attributed to any user, including administrators. This could lead to unauthorized data modification, which may violate integrity requirements in GDPR and HIPAA. However, specific compliance impacts depend on how the plugin is used in a given environment.

Mitigation Strategies

Update the Post Duplicator plugin to the latest version. If an update is unavailable, disable the plugin immediately. Restrict user roles to the minimum required permissions and monitor for suspicious post duplication activities.

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