XSS in Inisev Duplicate Post
CVE-2026-89424
The Duplicate Post plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'noti_token' parameter in all versions up to, and including, 1.5.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires that the site owner has enabled the plugin's User Level Permissions for the Subscriber role, as this grants access to the i_saw_this_noti AJAX branch needed to deliver the payload.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
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
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/c475c51e-f01d-4698-822f-5b8df…
- plugins.trac.wordpress.org/browser/copy-delete-posts/tags/1.5.6/menu/notificati…
- plugins.trac.wordpress.org/browser/copy-delete-posts/tags/1.5.6/menu/notificati…
- plugins.trac.wordpress.org/browser/copy-delete-posts/tags/1.5.6/post/handler.php
- plugins.trac.wordpress.org/browser/copy-delete-posts/tags/1.5.6/post/handler.php
- plugins.trac.wordpress.org/browser/copy-delete-posts/tags/1.5.6/post/handler.php
- plugins.trac.wordpress.org/changeset
- plugins.trac.wordpress.org/changeset/3709767/copy-delete-posts/trunk/menu/notif…
Frequently asked questions
- What is CVE-2026-89424?
- CVE-2026-89424 is a medium-severity vulnerability in Inisev Duplicate Post, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-10-01.
- How severe is CVE-2026-89424?
- Medium severity. CVSS v3 base score is 6.4 out of 10.