CVE-2026-4244

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

View on CVE.org

Published Aug 22, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

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.

Analysis

Technical impact

The Post Duplicator plug‑in for WordPress contains a missing capability check in its duplicate_post() function. The function accepts a selectedAuthorId parameter via the duplicate-post REST endpoint without verifying that the user holds the edit_others_posts capability, allowing an authenticated attacker to duplicate posts and attribute them to any user, including administrators. This flaw enables content spoofing and privilege escalation within the author assignment domain.

Affected Systems

The vulnerability affects the Post Duplicator plug‑in distributed by metaphorcreations. All versions up to and including 3.0.11 are affected, regardless of other WordPress or server configurations.

Risk and Exploitability

The CVSS score of 4.3 indicates a low severity rating, but the EPSS score is not available and the flaw is not listed in the CISA KEV catalog. The attack can be performed by any user with Contributor-level access or higher, so the risk is confined to authenticated users, although it allows the impersonation of administrators. The missing authorization check is the root weakness (CWE‑862).

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

metaphorcreations

Post Duplicator

unaffected

Version	Status	Constraints
`0`	affected	≤ 3.0.11

No data.

Vendor Product Versions

Metaphorcreations

Post Duplicator

Version	Status	Scheme	Platform
`[0,3.0.11]`	affected	semver	—

Wordpress

Version	Status	Scheme	Platform
`—`	unaffected	—	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Update the Post Duplicator plug‑in to the latest available release that implements proper capability checks.
Verify that Contributor roles (or similar low‑privilege roles) do not possess the edit_others_posts capability, and remove that capability if present.
Disable or restrict the duplicate-post REST endpoint for untrusted roles, or remove the selectedAuthorId parameter from the request payload.

Generated by OpenCVE AI on August 22, 2026 at 13:20 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.336% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L520
https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L550
https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L728
https://plugins.trac.wordpress.org/changeset/3485579/
https://www.wordfence.com/threat-intel/vulnerabilities/id/64553742-ff2b-40e9-92c3-3458a9f988a2?source=cve

History

Aug 24, 2026 1:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Aug 22, 2026 2:15 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Metaphorcreations Metaphorcreations post Duplicator Wordpress Wordpress wordpress
Vendors & Products		Metaphorcreations Metaphorcreations post Duplicator Wordpress Wordpress wordpress

Aug 22, 2026 12:45 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		Post Duplicator <= 3.0.11 - Missing Authorization to Authenticated (Contributor+) Post Duplication with Arbitrary Author Attribution
Weaknesses		CWE-862
References		https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L520 https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L550 https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L728 https://plugins.trac.wordpress.org/changeset/3485579/ https://www.wordfence.com/threat-intel/vulnerabilities/id/64553742-ff2b-40e9-92c3-3458a9f988a2?source=cve
Metrics		cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}`