# Fluent Support – Helpdesk & Customer Support Ticket System <= 2.4.5 - Authenticated (Support Agent+) Insecure Direct Object Reference to Out-of-Scope Ticket Disclosure via 'with' Parameter

- **ID:** WPSEC-2026-1606
- **Plugin:** Fluent Support – Helpdesk & Customer Support Ticket System (`fluent-support`), https://wordpress.org/plugins/fluent-support/
- **Affected versions:** all versions before 2.4.7
- **Fixed in:** 2.4.7 (Update to 2.4.7 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 Low, affected versions None seen (as of 2026-10-25)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/fluent-support
- **Fix released:** 2026-10-23
- **Published:** 2026-10-24
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1606/

## Description

The Fluent Support – Helpdesk & Customer Support Ticket System plugin for WordPress is vulnerable to Insecure Direct Object Reference via the 'with' parameter of the single-ticket REST endpoint in all versions up to, and including, 2.4.5. This is due to the user-supplied relation list being passed directly to the ticket query while the mailbox and per-ticket access checks only cover the requested ticket. This makes it possible for authenticated support agents whose ticket access is restricted (for example to their own tickets or to certain mailboxes) to request nested relations such as customer.tickets or agent.tickets, along with their responses, and read tickets and conversations outside their permitted scope.

## References

- https://wpsec.com/vuln/WPSEC-2026-1606/
- https://plugins.svn.wordpress.org/fluent-support/tags/2.4.7/
- https://wordpress.org/plugins/fluent-support/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1606/

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.