# Duplicate Post <= 1.5.7 - Authenticated (Subscriber+) Missing Authorization to Original Post Slug Modification

- **ID:** WPSEC-2026-2974
- **Plugin:** Duplicate Post (`copy-delete-posts`), https://wordpress.org/plugins/copy-delete-posts/
- **Affected versions:** from 1.5.1 before 1.5.8
- **Fixed in:** 1.5.8 (Update to 1.5.8 or later.)
- **Severity:** Low 3.1 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-862
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-11-12)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/copy-delete-posts
- **Fix released:** 2026-11-10
- **Published:** 2026-11-12
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2974/

## Description

The Duplicate Post plugin for WordPress is vulnerable to unauthorized modification of data in all versions from 1.5.1 up to, and including, 1.5.7. This is due to a missing edit_post capability check before the copy_post function renames the original post's slug when the 'take over original slug' option is enabled. This makes it possible for authenticated attackers, with subscriber-level access and above whose role has been granted access to the plugin, to change the slug of any post they can read and give the original URL to a copy.

## References

- https://wpsec.com/vuln/WPSEC-2026-2974/
- https://plugins.svn.wordpress.org/copy-delete-posts/tags/1.5.8/
- https://wordpress.org/plugins/copy-delete-posts/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2974/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.