CVE-2026-89289

Fast Courier <= 5.2.3 - Unauthenticated Order Fulfillment Update via order-status-update REST Endpoint

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.

Affected

Fast Courier

CVSS v3.1 CNA

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

0.18% chance of exploitation in the next 30 days, 7th percentile

Published

2026-10-06

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/716b6d58-a816-43f2-8a1a-b9fe4f2f9d1d/

References

• CVE Record
• NVD entry