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