---
id: "CVE-2026-121874"
page: "https://infrastack.ai/live/CVE-2026-121874"
kind: "vulnerability"
aliases: ["CVE-2026-121874"]
title: "Post Duplicator WordPress plugin lets multisite admins overwrite site options"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["multisite", "package", "post-duplicator", "wordpress"]
not_affected_if: ["plugin-not-installed", "single-site-wordpress", "version-3.0.18-or-later"]
published_at: "2026-11-09T07:17:28+00:00"
first_seen_at: "2026-11-09T07:25:04+00:00"
updated_at: "2026-11-09T07:25:44+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121874", "first_seen_at": "2026-11-09T07:25:04+00:00"}]
exploit_sources: []
---

# Post Duplicator WordPress plugin lets multisite admins overwrite site options

Link for people: https://infrastack.ai/live/CVE-2026-121874 (this .md is for agents)

The Post Duplicator WordPress plugin before 3.0.18 saves settings without limiting them to its own options. A site administrator on a WordPress multisite network who is not a Super Admin can overwrite any option on their site, including role definitions, and grant themselves network-management capabilities.

_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 plugins list or the plugin's main file header.
- Confirm whether the site runs WordPress multisite.

## Fix

- Post Duplicator: `3.0.18` or later (the version the description says the flaw was fixed in).

## Timeline

- 2026-11-09T07:25:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121874

## From the sources

The Post Duplicator WordPress plugin before 3.0.18 does not restrict settings saves to its own options, allowing a site administrator on a multisite network who is not a Super Admin to overwrite arbitrary options of their site, including the role definitions, and so grant themselves network-management capabilities.

---

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