CVE-2026-89289
Received Received - Intake

Unauthenticated REST API Order Status Modification in Fast Courier WordPress Plugin

Publication date: 2026-10-06

Last updated on: 2026-10-06

Assigner: WPScan

Description
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.

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Meta Information

Published
2026-10-06
Last Modified
2026-10-06
Generated
2026-10-06
AI Q&A
2026-10-06
EPSS Evaluated
N/A
NVD
CVE-2026-89289
EUVD
EUVD-2026-92967

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Unknown Fast Courier 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability affects the Fast Courier WordPress plugin versions 5.2.3 and earlier. It allows unauthenticated attackers to modify the courier status and tracking details of any WooCommerce order by exploiting a missing authorization check in the plugin's REST endpoint called 'order-status-update'.

Detection Guidance

Check for unauthorized modifications to WooCommerce order statuses or tracking details. Monitor REST API logs for requests to the 'order-status-update' route without authentication. Inspect plugin versions to confirm if Fast Courier 5.2.3 or earlier is installed.

Impact Analysis

Attackers could change order statuses and tracking information without authentication, potentially misleading customers about their order status or causing confusion in order fulfillment processes.

Mitigation Strategies

Disable the Fast Courier plugin immediately if installed. Monitor WooCommerce orders for unauthorized changes. Check for updates from the plugin developer or consider removing the plugin until a patch is released.

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