Vulnerability record · CVE-2021-43408 · published 19 November 2021
CVE-2021-43408: Duplicate post project duplicate post sql injection vulnerability
Duplicate Post Project · Duplicate Post
The "Duplicate Post" WordPress plugin up to and including version 1.1.9 is vulnerable to SQL Injection. SQL injection vulnerabilities occur when client supplied data is included within an SQL Query insecurely. SQL Injection can typically be exploited to read, modify and delete SQL table data. In many cases it also possible to exploit features of SQL server to execute system commands and/or access the local file system. This particular vulnerability can be exploited by any authenticated user who has been granted access to use the Duplicate Post plugin. By default, this is limited to Administrators, however the plugin presents the option to permit access to the Editor, Author, Contributor and Subscriber roles.
Description
The "Duplicate Post" WordPress plugin up to and including version 1.1.9 is vulnerable to SQL Injection. SQL injection vulnerabilities occur when client supplied data is included within an SQL Query insecurely. SQL Injection can typically be exploited to read, modify and delete SQL table data. In many cases it also possible to exploit features of SQL server to execute system commands and/or access the local file system. This particular vulnerability can be exploited by any authenticated user who has been granted access to use the Duplicate Post plugin. By default, this is limited to Administrators, however the plugin presents the option to permit access to the Editor, Author, Contributor and Subscriber roles.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.
References
| Link | Tags |
|---|---|
| https://appcheck-ng.com/security-advisory-duplicate-post-wordpress-plugin-sql-injection-vulnerability/ | ExploitThird Party Advisory |
| https://plugins.trac.wordpress.org/browser/copy-delete-posts/tags/1.2.0/post/handler.php#L510 | Third Party Advisory |
| https://appcheck-ng.com/security-advisory-duplicate-post-wordpress-plugin-sql-injection-vulnerability/ | ExploitThird Party Advisory |
| https://plugins.trac.wordpress.org/browser/copy-delete-posts/tags/1.2.0/post/handler.php#L510 | Third Party Advisory |
Track CVE-2021-43408 inside VULONE
Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.
Related vulnerabilities
Same products first, then exploited flaws of the same weakness class.
Source: NIST National Vulnerability Database (record CVE-2021-43408), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.
