# CVE-2026-121874: Post Duplicator arbitrary option update via authorization bypass

Source: https://junglewise.ai/threats/cve-2026-121874-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-2026-121874 · Severity: info · Published 2026-11-09

The Post Duplicator WordPress plugin allows site administrators on multisite networks who lack super-admin privileges to overwrite arbitrary site options, including role definitions. An attacker in this position could grant themselves elevated network-management capabilities, effectively escalating their privileges and gaining control over site functionality.

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-2026-121874 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-121874 being exploited in the wild.

**How severe is CVE-2026-121874?** Informational severity, published 9 November 2026.

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

**Is there a fix for CVE-2026-121874?** 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-2026-121874 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-121874?** 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 and restrict which options can be modified during settings saves, allowing a site administrator to update options beyond the plugin's own scope. This broken access control vulnerability (CWE-863) requires the attacker to hold administrator privileges on a multisite WordPress installation but not super-admin status. Successful exploitation leads to privilege escalation and network-level control.

## Affected products

- Post Duplicator Post Duplicator before 3.0.18

## Timeline

- 2026-11-06: disclosed
- 2026-11-06: patched: Fixed in version 3.0.18

## References

- [https://wpscan.com/vulnerability/ab1e031e-8f04-477e-85ea-a110c0ffe55f/](https://wpscan.com/vulnerability/ab1e031e-8f04-477e-85ea-a110c0ffe55f/)

## Related threats

- [Post Duplicator WordPress plugin privilege escalation in role permissions](https://junglewise.ai/threats/cve-2026-121875-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)