What is CVE-2026-121874?

CVE-2026-121874 is a high-severity vulnerability in Post Duplicator, classified under Incorrect Authorization. CVSS score: 7.2/10. Published 2026-11-09.

How severe is CVE-2026-121874?

High severity. CVSS v3 base score is 7.2 out of 10.

Auth bypass in Post Duplicator

CVE-2026-121874

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.

Vulnerability class: Broken Access Control

Published 2026-11-09 · last modified 2026-11-09.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Post Duplicator

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

wpscan.com/vulnerability/ab1e031e-8f04-477e-85ea-a110c0ffe55f/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-121874?: CVE-2026-121874 is a high-severity vulnerability in Post Duplicator, classified under Incorrect Authorization. CVSS score: 7.2/10. Published 2026-11-09.
How severe is CVE-2026-121874?: High severity. CVSS v3 base score is 7.2 out of 10.