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.

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.

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

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. 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/

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