---
id: "CVE-2026-121875"
page: "https://infrastack.ai/live/CVE-2026-121875"
kind: "vulnerability"
aliases: ["CVE-2026-121875"]
title: "Post Duplicator WordPress plugin lets multisite admins grant themselves Super Admin rights"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["multisite", "package", "wordpress", "wordpress-plugins"]
not_affected_if: ["no-multisite", "plugin-version-3.0.18-or-later", "single-site-wordpress"]
published_at: "2026-11-09T07:17:29+00:00"
first_seen_at: "2026-11-09T07:25:04+00:00"
updated_at: "2026-11-09T07:25:42+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121875", "first_seen_at": "2026-11-09T07:25:04+00:00"}]
exploit_sources: []
---

# Post Duplicator WordPress plugin lets multisite admins grant themselves Super Admin rights

Link for people: https://infrastack.ai/live/CVE-2026-121875 (this .md is for agents)

The Post Duplicator WordPress plugin before 3.0.18 does not validate role capabilities set in its permissions settings. A non-Super Admin on a WordPress multisite network can grant any role arbitrary capabilities, including network-management ones reserved for Super Admin.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Post Duplicator version in the WordPress admin plugin list or `wp plugin get post-duplicator --field=version` (unknown if the exact plugin slug differs)
- Confirm whether the site runs WordPress multisite, since the sources describe the flaw only for multisite networks

## Fix

- Post Duplicator `3.0.18` (the plugin is fixed in versions from `3.0.18`, per the advisory description)

## Timeline

- 2026-11-09T07:25:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121875

## From the sources

The Post Duplicator WordPress plugin before 3.0.18 does not validate the capabilities assigned to roles through its permissions settings, allowing a site administrator on a multisite network who is not a Super Admin to grant any role arbitrary capabilities, including the network-management capabilities reserved to the Super Admin.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_