Post Duplicator <= 3.0.8 - Missing Authorization to Authenticated (Contributor+) Protected Post Meta Insertion via 'customMetaData' Parameter
| CVE | CVE-2026-2301 |
|---|---|
| CVSS | 4.3 (Medium) |
| Publicly Published | February 24, 2026 |
| Last Updated | February 25, 2026 |
| Researcher |
bashu
- VN
|
Description
The Post Duplicator plugin for WordPress is vulnerable to unauthorized arbitrary protected post meta insertion in all versions up to, and including, 3.0.8. This is due to the `duplicate_post()` function in `includes/api.php` using `$wpdb->insert()` directly to the `wp_postmeta` table instead of WordPress's standard `add_post_meta()` function, which would call `is_protected_meta()` to prevent lower-privileged users from setting protected meta keys (those starting with `_`). This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary protected post meta keys such as `_wp_page_template`, `_wp_attached_file`, and other sensitive meta keys on duplicated posts via the `customMetaData` JSON array parameter in the `/wp-json/post-duplicator/v1/duplicate-post` REST API endpoint.
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Vulnerability Details for Post Duplicator
| Software Type | Plugin |
|---|---|
| Software Slug | post-duplicator (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 3.0.9, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Post Duplicator
| # | Title | CVE ID | CVSS | Researchers | Date |
|---|---|---|---|---|---|
| 1 | Post Duplicator < 3.0.15 - Authenticated (Contributor+) PHP Object Injection | CVE-2026-10749 | Md. Minaruzzaman Shovon | June 25, 2026 | |
| 2 | Post Duplicator <= 3.0.10 - Authenticated (Contributor+) PHP Object Injection | CVE-2026-39474 | Nguyen Ba Khanh | April 13, 2026 | |
| 3 | Post Duplicator <= 2.35 - Missing Authorization | CVE-2025-24736 | Kévin Mosbahi (Mika) | January 24, 2025 | |
| 4 | Post Duplicator <= 2.36 - Authenticated (Contributor+) Protected Post Disclosure | CVE-2024-12472 | Webbernaut | January 10, 2025 | |
| 5 | Post Duplicator <= 2.31 - Missing Authorization via mtphr_duplicate_post | CVE-2023-49835 | Huynh Tien Si | December 5, 2023 | |
| 6 | Post Duplicator <= 2.23 - Cross-Site Scripting | CVE-2021-33852 | December 2, 2021 | ||
| 7 | Post Duplicator <= 2.16 - Reflected Cross-Site Scripting | CVE-2016-15027 | April 6, 2016 |
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