# Icegram Express <= 5.9.42 - Authenticated (Contributor+) Insecure Direct Object Reference to Private Post Disclosure via Template Duplication

- **ID:** WPSEC-2026-3140
- **Plugin:** Email Subscribers & Newsletters by Icegram Express – Email Marketing, Post Notifications & WooCommerce Marekting Automation for WordPress (`email-subscribers`), https://wordpress.org/plugins/email-subscribers/
- **Affected versions:** from 4.0.18 before 5.9.43
- **Fixed in:** 5.9.43 (Update to 5.9.43 or later.)
- **Severity:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
- **Weakness:** CWE-639
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-14)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/email-subscribers
- **Fix released:** 2026-11-13
- **Published:** 2026-11-14
- **URL:** https://wpsec.com/vuln/WPSEC-2026-3140/

## Description

The Email Subscribers & Newsletters by Icegram Express plugin for WordPress is vulnerable to Insecure Direct Object Reference via the 'duplicate-template' template action in all versions up to, and including, 5.9.42, due to the duplicate_template() handler accepting a user-controlled 'template_id' without checking the post type, the post status, or whether the user may edit that post. This makes it possible for authenticated attackers with Contributor-level access and above to copy any post, including private or password-protected posts written by other users, into a new draft they own, then read its content and custom fields.

## References

- https://wpsec.com/vuln/WPSEC-2026-3140/
- https://plugins.svn.wordpress.org/email-subscribers/tags/5.9.43/
- https://wordpress.org/plugins/email-subscribers/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-3140/

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.