CVE-2026-110607 in Shop
Summary
by MITRE • 10/14/2026
BizSpring Shop through commit cf22d39daaf1 contains a payment verification bypass vulnerability that allows authenticated buyers to mark orders paid by calling the PaymentController.testPostPay handler. Attackers can generate a payment log via /member/payment/load and request /member/payment/test_post_pay_{paymentLogSn} to obtain goods without paying or settle other members' orders.
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Analysis
by VulDB Data Team • 10/14/2026
The vulnerability identified in BizSpring Shop, specifically within commit cf22d39daaf1, represents a critical authentication bypass flaw located within the payment processing module of the application architecture. This security defect allows authenticated users to manipulate the state of their transactions by exploiting an insecure direct object reference mechanism combined with insufficient authorization checks on administrative or verification endpoints. The core issue stems from the existence of a handler method named testPostPay within the PaymentController class, which was likely intended for internal testing purposes but remains accessible in production environments without adequate access controls. This design oversight enables any authenticated buyer to artificially mark an order as paid by invoking this specific endpoint, effectively bypassing legitimate payment gateway integrations and financial verification processes.
From a technical perspective, the exploitation chain begins with the attacker authenticating to the application using valid credentials. Once logged in, the user navigates to or programmatically accesses the /member/payment/load endpoint to retrieve existing order details, including sensitive identifiers such as the payment log serial number (paymentLogSn). With this information obtained through a legitimate authenticated request, the attacker then constructs a targeted HTTP POST request directed at the path /member/payment/test_post_pay_{paymentLogSn}, substituting {paymentLogSn} with the identifier of either their own unpaid order or that of another user. Because the testPostPay handler lacks proper validation to ensure it is only executed by system administrators during development phases, and fails to verify that a real financial transaction has occurred via external payment providers, the application blindly updates the database record to reflect a paid status. This constitutes an insecure direct object reference vulnerability where sequential or predictable identifiers are used without sufficient ownership verification relative to the current session context for sensitive state changes.
The operational impact of this vulnerability is severe and directly affects the financial integrity of the e-commerce platform. Attackers can acquire high-value goods, digital services, or subscription memberships without incurring any cost, leading to direct revenue loss for the business. Furthermore, because the flaw allows settling other members' orders, it introduces significant risks related to fraud and account compromise. An attacker could potentially resolve disputes on behalf of another user, manipulate order statuses to trigger shipping workflows prematurely, or use this capability as a stepping stone for further exploitation within the application logic. This undermines trust in the platform's transactional reliability and exposes customer data and financial records to potential manipulation through state-based attacks rather than traditional injection techniques.
This vulnerability aligns closely with CWE-284 Improper Access Control, specifically regarding insufficient authorization checks on critical functions, and CWE-601 URL Redirection to Untrusted Site or similar patterns where internal endpoints are exposed improperly. In the context of the MITRE ATT&CK framework for enterprise security, this behavior maps to T1539 Steal Web Session Cookie if session hijacking is involved in obtaining access, but more accurately reflects T1482 Supply Chain Compromise if the code was introduced via a third-party library or developer error during deployment. It also relates to T1078 Valid Accounts as it requires initial authentication, and specifically demonstrates flaws consistent with CWE-359 Creation of Chosen Key for Cryptographic Operation if cryptographic tokens were involved in payment verification, though here it is primarily an access control failure.
To mitigate this vulnerability, immediate remediation steps must focus on removing or strictly restricting access to the testPostPay endpoint in all non-development environments. The most effective solution involves deleting the /member/payment/test_post_pay_{paymentLogSn} route entirely from production builds if it serves no functional purpose for end-users. If such endpoints are required for debugging, they should be protected by multi-factor authentication restricted exclusively to internal administrative IP addresses and user roles with explicit system-level privileges rather than standard customer accounts. Additionally, implementing robust input validation and ownership verification logic is essential; any endpoint modifying payment status must verify that the requesting user owns the specific order ID being modified and confirm a successful callback from an external payment processor before updating database records. Regular security code reviews focusing on controller endpoints exposed to authenticated users can prevent similar insecure direct object references in future development cycles, ensuring that internal testing mechanisms do not leak into production systems with elevated privileges.