# Order Tracking <= 3.5.4 - Unauthenticated Payment Bypass via PayPal IPN

- **ID:** WPSEC-2026-0562
- **Plugin:** Order Tracking – WordPress Status Tracking Plugin (`order-tracking`), https://wordpress.org/plugins/order-tracking/
- **Affected versions:** all versions before 3.6.0
- **Fixed in:** 3.6.0 (Update to 3.6.0 or later.)
- **Severity:** Medium 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-345
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-07)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/order-tracking
- **Fix released:** 2026-10-05
- **Published:** 2026-10-07
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0562/

## Description

The Order Tracking plugin for WordPress is vulnerable to payment bypass in all versions up to, and including, 3.5.4 due to the PayPal IPN handler marking the order referenced in a PayPal-verified notification as paid without checking the payment status, amount, currency or receiving account. This makes it possible for unauthenticated attackers to mark orders as paid without paying the order's price on sites where order payments are enabled.

## References

- https://wpsec.com/vuln/WPSEC-2026-0562/
- https://plugins.svn.wordpress.org/order-tracking/tags/3.6.0/
- https://wordpress.org/plugins/order-tracking/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0562/

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.