# CVE-2026-121875: Post Duplicator WordPress plugin privilege escalation in role permissions

Source: https://junglewise.ai/threats/cve-2026-121875-the-post-duplicator-wordpress-plugin-before-3-0-18-does-not  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-09. Updated: 2026-11-09  
License: CC BY 4.0 with a link back

CVE-2026-121875 · Severity: info · Published 2026-11-09

Post Duplicator is a WordPress plugin that manages duplication of posts and pages. A site administrator on a WordPress multisite network who is not a Super Admin can exploit a validation flaw to grant arbitrary capabilities to roles, including network-management powers normally restricted to Super Admins, leading to unauthorized privilege escalation.

Technologies: [Post Duplicator](https://junglewise.ai/threats/technologies/post-duplicator-post-duplicator). Vendors: [Post Duplicator](https://junglewise.ai/threats/vendors/post-duplicator).

## Quick answers

**Is CVE-2026-121875 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-121875 being exploited in the wild.

**How severe is CVE-2026-121875?** Informational severity, published 9 November 2026.

**Which products and versions are affected?** Post Duplicator before 3.0.18.

**Is there a fix for CVE-2026-121875?** Yes: fixed in 3.0.18. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-121875 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-121875?** Check whether you run Post Duplicator at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 3.0.18

## Technical details

The plugin fails to validate capabilities assigned to roles through its permissions settings, allowing a non-Super Admin site administrator to assign any capability to any role, including network-reserved capabilities. This is a privilege escalation vulnerability accessible to authenticated administrators on multisite installations who lack Super Admin status. A fix is available in version 3.0.18.

## Affected products

- Post Duplicator Post Duplicator before 3.0.18

## Timeline

- 2026-11-06: disclosed
- 2026-11-09: advisory

## References

- [https://wpscan.com/vulnerability/543db6f0-78dd-4c18-ac64-fbcb122771bd/](https://wpscan.com/vulnerability/543db6f0-78dd-4c18-ac64-fbcb122771bd/)

## Related threats

- [Post Duplicator arbitrary option update via authorization bypass](https://junglewise.ai/threats/cve-2026-121874-the-post-duplicator-wordpress-plugin-before-3-0-18-does-not)
- [Post Duplicator information disclosure in post list](https://junglewise.ai/threats/cve-2026-111740-the-post-duplicator-wordpress-plugin-before-3-0-17-does-not)