---
id: CVE-2026-89289
title: >-
  The Fast Courier  WordPress plugin through 5.2.3 does not restrict an
  unauthenticated REST route that writes order fulfillment data, allowing
  unauthenticated attackers to overwrite the courier status and customer-facing
  tracking details …
summary: >-
  The Fast Courier  WordPress plugin through 5.2.3 does not restrict an
  unauthenticated REST route that writes order fulfillment data, allowing
  unauthenticated attackers to overwrite the courier status and customer-facing
  tracking details …
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-862
product: Fast Courier
affected:
  - fast_courier <= 5.2.3
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T15:18:12.170'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89289'
references:
  - url: 'https://wpscan.com/vulnerability/716b6d58-a816-43f2-8a1a-b9fe4f2f9d1d/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-06T10:31:58.417839Z'
ingestedAt: '2026-10-06T06:48:36.103Z'
epss: 0.00182
epssPercentile: 0.07677
---

## Overview

The Fast Courier  WordPress plugin through 5.2.3 does not restrict an unauthenticated REST route that writes order fulfillment data, allowing unauthenticated attackers to overwrite the courier status and customer-facing tracking details of any WooCommerce order by supplying its id.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.