CVE-2025-9836: Macrozheng Mall Authorization Bypass Flaw

CVE-2025-9836 Overview

CVE-2025-9836 is an authorization bypass vulnerability in macrozheng mall versions up to 1.0.3. The flaw affects the paySuccess function in the /order/paySuccess endpoint. Attackers can manipulate the orderId argument to bypass authorization checks over the network. The issue is classified under CWE-285: Improper Authorization. A public proof-of-concept has been disclosed, increasing the likelihood of opportunistic exploitation against exposed instances of the e-commerce platform.

Critical Impact
Remote attackers with low privileges can bypass authorization on order payment confirmation, potentially marking arbitrary orders as paid without valid authentication context.

Affected Products

macrozheng mall versions up to and including 1.0.3
Deployments exposing the /order/paySuccess endpoint to untrusted networks
Self-hosted instances built on the affected commit range of the macrozheng/mall repository

Discovery Timeline

2025-09-02 - CVE-2025-9836 published to the National Vulnerability Database
2026-06-17 - Last updated in the NVD database

Technical Details for CVE-2025-9836

Vulnerability Analysis

The vulnerability resides in the paySuccess function handling requests to /order/paySuccess in the macrozheng mall application. The endpoint accepts an orderId parameter to mark an order as successfully paid. The application fails to verify that the authenticated caller owns the referenced order, resulting in improper authorization ([CWE-285]).

An attacker with a low-privileged account can submit crafted requests referencing arbitrary orderId values belonging to other users. Because the server-side check is missing or insufficient, the callback logic treats the request as a legitimate payment confirmation. This affects order state integrity within the e-commerce workflow.

A public proof-of-concept referenced in the GitHub PoC Issue #47 demonstrates the manipulation. Additional analysis is available at VulDB #322183.

Root Cause

The root cause is a missing authorization check on the orderId parameter in the paySuccess handler. The function trusts the client-supplied identifier without validating that the current session principal is the legitimate owner of the order. This design allows horizontal privilege escalation across order records.

Attack Vector

The attack vector is remote over the network. An attacker requires only low-level authentication to interact with the endpoint. No user interaction is needed. The exploit involves sending a request to /order/paySuccess with an orderId value belonging to another account, triggering the payment success workflow for that order.

No verified exploitation code is republished here. Refer to the GitHub PoC Issue Comment for the disclosed request pattern.

Detection Methods for CVE-2025-9836

Indicators of Compromise

Repeated POST or GET requests to /order/paySuccess from a single authenticated session referencing multiple distinct orderId values
Order records transitioning to a paid state without corresponding payment gateway callbacks or transaction logs
Access log entries showing orderId values that do not belong to the requesting user's account

Detection Strategies

Correlate application-layer logs against session identity to flag requests where the requested orderId does not map to the caller's account
Deploy Web Application Firewall (WAF) rules to inspect /order/paySuccess traffic and rate-limit callers issuing anomalous request patterns
Reconcile order state changes against payment gateway transaction records to identify unauthorized status updates

Monitoring Recommendations

Enable verbose logging on the order service and forward events to a centralized SIEM for correlation
Alert on order state transitions to paid status that lack an associated payment provider confirmation
Monitor authentication logs for accounts issuing unusually high volumes of requests to order endpoints

How to Mitigate CVE-2025-9836

Immediate Actions Required

Restrict network exposure of the /order/paySuccess endpoint to internal callers or trusted payment gateway IP ranges
Audit recent order state changes for evidence of unauthorized paid-status transitions
Add server-side authorization checks confirming the authenticated user owns the referenced orderId before processing

Patch Information

No vendor advisory or fixed version has been published in the enriched CVE data. Review the macrozheng/mall GitHub repository for updates beyond version 1.0.3. Track disclosure activity at VulDB #322183 Technical Analysis and the VulDB Submission #641738 for remediation status.

Workarounds

Implement a reverse proxy or WAF rule that requires the orderId in the request to match a value bound to the current session
Validate payment success exclusively through server-to-server callbacks from the payment gateway rather than client-initiated requests
Apply defense-in-depth by requiring signed tokens tied to the order and user for any state-changing operations on /order/paySuccess

bash

# Example nginx rule to restrict paySuccess to internal callers
location /order/paySuccess {
    allow 10.0.0.0/8;      # internal payment service network
    deny all;
    proxy_pass http://mall-backend;
}