CVE-2025-9936: Fuyang Lipengjun Platform Auth Bypass Flaw

CVE-2025-9936 Overview

CVE-2025-9936 is an improper authorization vulnerability [CWE-266] in the fuyang_lipengjun platform version 1.0.0. The flaw affects the AdController function that handles requests to the /ad/queryAll endpoint. Attackers can invoke this endpoint remotely without proper access checks and retrieve advertising data intended to be restricted. Public exploit details have been disclosed, increasing the likelihood of opportunistic abuse against exposed instances.

Critical Impact
Remote attackers with low privileges can access advertising data through the /ad/queryAll endpoint without the authorization checks the application should enforce.

Affected Products

fuyang_lipengjun platform 1.0.0
AdController handler for /ad/queryAll
Deployments exposing the vulnerable endpoint to untrusted networks

Discovery Timeline

2025-09-04 - CVE-2025-9936 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-9936

Vulnerability Analysis

The vulnerability resides in the AdController class of the fuyang_lipengjun platform. The /ad/queryAll handler processes requests without verifying whether the requesting principal is entitled to enumerate advertising records. This maps to CWE-266 (Incorrect Privilege Assignment), where a low-privileged role receives access reserved for administrative users. The exploit vector is network-based and requires only low-privilege authentication, according to the published CVSS 4.0 vector. Public technical write-ups describe the endpoint and its behavior, lowering the barrier to reproduction.

Root Cause

The root cause is a missing authorization check inside AdController.queryAll. The controller returns advertising records to any authenticated caller regardless of role. There is no server-side enforcement tying the requested resource to the caller's privilege level, so the application relies solely on client-side or route-level assumptions.

Attack Vector

An authenticated attacker sends an HTTP request to /ad/queryAll against a reachable instance of the platform. The server processes the request through AdController and returns the full advertising dataset. No user interaction is required, and the attack can be automated with standard HTTP tooling. See the VulDB Entry #322338 and the Cnblogs Analysis Post for technical context.

No verified proof-of-concept code is included in this advisory. Refer to the published references for endpoint details.

Detection Methods for CVE-2025-9936

Indicators of Compromise

Unexpected HTTP GET or POST requests to /ad/queryAll from low-privilege accounts or unknown source addresses.
High-volume enumeration patterns against /ad/* routes originating from a single client.
Application logs showing successful AdController.queryAll invocations by users who never accessed the admin console.

Detection Strategies

Inspect web server and application logs for authenticated access to /ad/queryAll and correlate the account role with the response size.
Compare accessed endpoints against a role-to-endpoint access matrix and alert on mismatches.
Deploy a web application firewall rule that flags requests to /ad/queryAll originating outside expected admin subnets.

Monitoring Recommendations

Forward application access logs to a central analytics platform and build queries around the /ad/queryAll path.
Track authentication events alongside sensitive endpoint access to identify role-privilege mismatches.
Alert on newly created or dormant accounts issuing requests to administrative controllers.

How to Mitigate CVE-2025-9936

Immediate Actions Required

Restrict network access to the fuyang_lipengjun platform administrative endpoints using reverse proxy or firewall rules.
Disable or block the /ad/queryAll route until a vendor fix is available.
Rotate credentials for any accounts that may have been used to query the endpoint without authorization.

Patch Information

No vendor advisory or official patch is listed in the enriched data for CVE-2025-9936. Monitor the VulDB CTI ID #322338 reference and vendor repositories for updates. Until a patched release is published, apply compensating controls at the network and application layer.

Workarounds

Add a server-side authorization check in AdController.queryAll that validates the caller's role before returning data.
Enforce role-based access control at a reverse proxy by denying non-admin sessions access to /ad/* routes.
Reduce the platform's attack surface by placing it behind a VPN or IP allow-list until a fix is confirmed.

bash

# Example nginx rule restricting /ad/queryAll to an internal admin subnet
location = /ad/queryAll {
    allow 10.10.0.0/24;
    deny all;
    proxy_pass http://platform_backend;
}