CVE-2026-89289
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductFast Courier
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-862Missing authorization
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Fast Courier | v ≤ 5.2.3 | — |
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