Vulnerability · Published Oct 6, 2026 · Assigned by WPScan
CVE-2026-89289Fast Courier <= 5.2.3 - Unauthenticated Order Fulfillment Update via order-status-update REST Endpoint
Medium 5.3
In plain English
A medium-severity missing authorization in Fast Courier from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 92.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Fast Courier | 0 – through 5.2.3 |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://wpscan.com/vulnerability/716b6d58-a816-43f2-8a1a-b9fe4f2f9d1d/ exploit, vdb-entry, technical-description