# Fusion Page Builder <= 1.6.7 - Authenticated (Contributor+) Insecure Direct Object Reference to Arbitrary Post Trashing

- **ID:** WPSEC-2026-2600
- **Plugin:** Fusion Page Builder (`fusion`), https://wordpress.org/plugins/fusion/
- **Affected versions:** all versions before 1.7.1
- **Fixed in:** 1.7.1 (Update to 1.7.1 or later.)
- **Severity:** Medium 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L)
- **Weakness:** CWE-639
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-11-05)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/fusion
- **Fix released:** 2026-11-04
- **Published:** 2026-11-05
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2600/

## Description

The Fusion Page Builder plugin for WordPress is vulnerable to Insecure Direct Object Reference via the template delete AJAX handler in all versions up to, and including, 1.6.7 due to the capability check covering only the user-supplied 'post_id' while wp_trash_post() is called on an arbitrary, unvalidated 'template_id'. This makes it possible for authenticated attackers, with Contributor-level access and above, to trash any post or page on the site, including content authored by other users.

## References

- https://wpsec.com/vuln/WPSEC-2026-2600/
- https://plugins.svn.wordpress.org/fusion/tags/1.7.1/
- https://wordpress.org/plugins/fusion/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2600/

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.