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CVE-2026-89289— Fast Courier <= 5.2.3 - Unauthenticated Order Fulfillment Update via order-status-update REST Endpoint

Quick assessment

Affected
Unknown Fast Courier
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fast Courier WordPress 插件在 5.2.3 版本及更早版本中存在漏洞，该漏洞未对未认证的 REST API 路由进行访问限制，该路由用于写入订单履行数据。攻击者无需认证即可通过提供任意 WooCommerce 订单的 ID，覆盖该订单的快递状态以及面向客户的物流跟踪详情。

AI Predicted 7.5 Difficulty: Easy

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-89289

Vulnerability Information
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Vulnerability Title
Fast Courier <= 5.2.3 - Unauthenticated Order Fulfillment Update via order-status-update REST Endpoint
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Fast Courier 0 ~ 5.2.3 -

II. Public POCs for CVE-2026-89289

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III. Intelligence Information for CVE-2026-89289

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Other References for CVE-2026-89289 (1)

Same Patch Batch · Unknown · 2026-10-06 · 6 CVEs total

CVE-2026-86786 Slider Pro <= 1.0.0 - Unauthenticated Sensitive Data Disclosure via sliderpro_multiple_ima
CVE-2026-94299 elegro Crypto Payment <= 1.0.1 - Unauthenticated Arbitrary Order Status Change via IPN Cal
CVE-2026-94270 Deema Payment Gateway <= 1.1.2 - Unauthenticated Payment Bypass and Order Manipulation via
CVE-2026-94278 File Media Renamer <= 1.3 - Author+ Arbitrary File Rename via save-attachment-compat
CVE-2026-94271 Deema Payment Gateway <= 1.1.2 - Unauthenticated Payment Confirmation Forgery via Unverifi

IV. Related Vulnerabilities

Same vendor: Unknown

V. Comments for CVE-2026-89289

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