medium5.4
CVE-2026-1217
Yoast Duplicate Post has an Authenticated (Contributor+) Missing Authorization to Arbitrary Post Duplication and Overwrite
Impact
The Yoast Duplicate Post plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the clone_bulk_action_handler() and republish_request() functions in all versions up to, and including, 4.5. This makes it possible for authenticated attackers, with Contributor-level access and above, to duplicate any post on the site including private, draft, and trashed posts they shouldn't have access to. Additionally, attackers with Author-level access and above can use the Rewrite & Republish feature to overwrite any published post with their own content.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | yoast/duplicate-post | <= 4.5 | 4.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://plugins.trac.wordpress.org/browser/duplicate-post/tags/4.5/src/handlers/bulk-handler.php#L115
- https://plugins.trac.wordpress.org/browser/duplicate-post/tags/4.5/src/post-republisher.php#L128
- https://www.wordfence.com/threat-intel/vulnerabilities/id/05f175e6-08a9-4199-948c-5bd8b3caaa39?source=cve
- https://github.com/advisories/GHSA-g9w4-m5fx-x3wv
- https://nvd.nist.gov/vuln/detail/CVE-2026-1217