CVE-2025-4136: Weitong Mall Authorization Bypass Vulnerability

CVE-2025-4136 Overview

CVE-2025-4136 is an improper authorization vulnerability [CWE-266] in Weitong Mall 1.0.0. The flaw resides in the Sale Endpoint component, where manipulation of the ID argument allows an authenticated attacker to access or modify resources beyond their permitted scope. The vulnerability is exploitable remotely over the network and requires low privileges with no user interaction. Public disclosure of the exploit technique increases the likelihood of opportunistic exploitation against exposed Weitong Mall deployments.

Critical Impact

Authenticated remote attackers can bypass authorization controls on the Sale Endpoint by tampering with the ID parameter, exposing sale-related data and enabling unauthorized modifications.

Affected Products

• Weitong Mall 1.0.0
• Sale Endpoint component within Weitong Mall
• Deployments exposing the affected endpoint to untrusted networks

Discovery Timeline

• 2025-04-30 - CVE-2025-4136 published to the National Vulnerability Database
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-4136

Vulnerability Analysis

The vulnerability is an improper authorization weakness classified under [CWE-266]. The Sale Endpoint in Weitong Mall 1.0.0 processes an ID parameter without verifying that the requesting user is authorized to operate on the referenced resource. An authenticated attacker can substitute another user's or another record's identifier and receive a successful response.

This class of flaw is commonly referred to as an Insecure Direct Object Reference. The application trusts the client-supplied identifier and performs the requested operation. The result is limited integrity and availability impact on records accessible through the endpoint, without direct confidentiality loss beyond what the endpoint returns.

Exploitation requires network access to the application and valid low-privilege credentials. No user interaction is needed. Because the exploit is public, defenders should assume attackers can reproduce the request patterns using standard HTTP tooling.

Root Cause

The root cause is missing server-side authorization checks on the Sale Endpoint. The application performs authentication but fails to enforce that the authenticated principal owns or has access to the object identified by the ID parameter. Authorization is implicitly assumed rather than verified per request.

Attack Vector

An attacker authenticates with any valid account and issues HTTP requests to the Sale Endpoint. By iterating or guessing values of the ID argument, the attacker reaches records that belong to other tenants or users. The Sale Endpoint returns or acts on the referenced record without validating ownership.

Refer to the VulDB entry #306627 and the CNBlogs technical write-up for request-level details and reproduction context.

Detection Methods for CVE-2025-4136

Indicators of Compromise

• Repeated HTTP requests to the Sale Endpoint with sequential or enumerated ID parameter values from a single session.
• Access patterns where one authenticated user session touches sale records associated with many distinct account identifiers.
• Unexpected modifications to sale records not correlated with legitimate administrative actions.

Detection Strategies

• Instrument the Sale Endpoint to log the authenticated user, the requested ID, and the record owner, then alert when they diverge.
• Deploy a web application firewall rule that flags rapid enumeration of the ID parameter from a single session.
• Correlate authentication events with sale record access to identify horizontal privilege escalation attempts.

Monitoring Recommendations

• Baseline normal request volume and ID cardinality per user on the Sale Endpoint and alert on deviations.
• Retain HTTP access logs with full query strings and request bodies for the affected endpoint for forensic review.
• Monitor outbound response sizes on the Sale Endpoint for anomalies suggesting bulk data extraction.

How to Mitigate CVE-2025-4136

Immediate Actions Required

• Restrict network exposure of the Weitong Mall Sale Endpoint to trusted networks or authenticated internal users only.
• Audit application logs for prior enumeration of the ID parameter and investigate any anomalous access.
• Rotate credentials for accounts that may have been abused to test the flaw.

Patch Information

No vendor patch has been referenced in the public advisory sources at the time of publication. Track the VulDB entry #306627 and the Weitong Mall project channels for updates. Apply an official fix as soon as it becomes available.

Workarounds

• Implement a reverse proxy or middleware layer that enforces ownership checks on the ID parameter before requests reach the Sale Endpoint.
• Enforce strict role-based access control at the application gateway to limit which authenticated users can reach the Sale Endpoint.
• Add server-side authorization checks that compare the session principal to the owner of the record identified by ID and reject mismatches.

# Example WAF rule concept to flag ID enumeration on the Sale Endpoint
# Pseudocode - adapt to your WAF syntax
SecRule REQUEST_URI "@contains /sale" \
  "id:1004136,phase:2,deny,status:403,\
   chain,msg:'Possible CVE-2025-4136 ID enumeration'"
  SecRule &ARGS:ID "@gt 0" \
    "chain"
    SecRule IP:SALE_ID_COUNT "@gt 20"