WordPress security changelog
MEDIUM CVE-2026-4245 Deferred

Post Duplicator bypasses publishing and post-type restrictions

A Contributor or higher can pass duplicate_post_permissions() with duplicate_posts but without publish_posts or status-specific authorization. They can create future or private duplicate posts, bypassing editorial review, and duplicate post types disabled by an administrator. The REST route and status parameter name are unspecified. Affected versions: <= 3.0.11. Confirmed fixed release: 3.0.12.

CVE / CNA score 4.3 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Post Duplicator
Plugin slug
post-duplicator
Affected
<= 3.0.11
Safe version
3.0.12
Published
Aug 22, 2026
Weakness
CWE-863 — Incorrect Authorization

This CVE was published Aug 22, 2026 and is one of 10 known issues for this plugin.

What to do

Update, patch or deactivate.

Update to 3.0.12 or later, preferably the current supported release. Enforce publishing and private-post capabilities for the requested final status and check configured post-type restrictions in the REST permission callback. Review unexpected scheduled or private duplicates. The official changelog matches this fix in 3.0.12. Official changelog: https://wordpress.org/plugins/post-duplicator/#developers

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Post Duplicator plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.0.11. This is due to the `duplicate_post_permissions()` permission callback only verifying the `duplicate_posts` capability without checking whether the requesting user holds `publish_posts` or other status-gated capabilities. This makes it possible for authenticated attackers, with Contributor-level access and above, to create duplicate posts with `future` (scheduled, auto-publishes) or `private` status, bypassing editorial review. Additionally, the REST endpoint does not enforce administrator-configured post-type duplication restrictions, allowing duplication of post types that have been explicitly disabled.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

Primary and upstream sources