# FunnelKit Automations – Email Marketing Automation and CRM for WordPress & WooCommerce <= 3.8.6.1 - Unauthenticated PHP Object Injection via Abandoned Cart Checkout Fields

- **ID:** WPSEC-2026-1917
- **Plugin:** FunnelKit Automations – Email Marketing Automation and CRM for WordPress & WooCommerce (`wp-marketing-automations`), https://wordpress.org/plugins/wp-marketing-automations/
- **Affected versions:** all versions before 3.8.6.2
- **Fixed in:** 3.8.6.2 (Update to 3.8.6.2 or later.)
- **Severity:** High 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **Weakness:** CWE-502
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-10-29)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/wp-marketing-automations
- **Fix released:** 2026-10-28
- **Published:** 2026-10-29
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1917/

## Description

The FunnelKit Automations plugin for WordPress is vulnerable to PHP Object Injection via the abandoned cart capture ('checkout_fields_data') in all versions up to, and including, 3.8.6.1, due to deserialization of untrusted input. Checkout field values are stored with only sanitize_text_field(), which leaves PHP-serialized strings intact. When the cart is marked abandoned, the address, city and postcode values are saved as CRM contact fields, and those values are later passed to maybe_unserialize() whenever the contact is loaded. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

## References

- https://wpsec.com/vuln/WPSEC-2026-1917/
- https://plugins.svn.wordpress.org/wp-marketing-automations/tags/3.8.6.2/
- https://wordpress.org/plugins/wp-marketing-automations/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1917/

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.