CVE-2026-4244

Post Duplicator <= 3.0.11 - Missing Authorization to Authenticated (Contributor+) Post Duplication with Arbitrary Author Attribution

2026-08-21 00:00
Abi Wiranata

Strategic Overview

Status
Patched in 3.0.12
Affected Plugin
Post Duplicator
Affected Version
<= 3.0.11
CVSS
4.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2026-4244
View all Post Duplicator vulnerabilities

At a glance

CVE-2026-4244 is a medium-severity Missing Authorization vulnerability in the Post Duplicator WordPress plugin, affecting versions <= 3.0.11. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 3.0.12; sites on affected versions should update now. Disclosed August 2026, reported by Abi Wiranata.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-862: Missing Authorization

Post Duplicator <= 3.0.11 carries this weakness at duplicate_post(), and reaching it takes an account at Contributor level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Post Duplicator the fix is 3.0.12: builds <= 3.0.11 are affected, anything from 3.0.12 onward is not.

Remediation

Update to version 3.0.12, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Post Duplicator 3.0.12 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-4244https://www.wordfence.com/threat-intel/vulnerabilities/id/64553742-ff2b-40e9-92c3-3458a9f988a2https://nvd.nist.gov/vuln/detail/CVE-2026-4244

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C