2026.3.21 Micro-Trade Forex Trading Platform Security Vulnerability Fix in Practice: ThinkPHP SQL Injection & Malicious Code Removal Guide

Abstract

This article documents in detail the complete process of security vulnerability remediation for the Micro-Trade Forex Trading Platform, providing practical reference for developers.

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1. Platform Overview

Micro-Trade is a mobile forex options trading platform developed based on the ThinkPHP 5 framework, supporting trading of various financial products including forex, gold, and crude oil.

Tech Stack: ThinkPHP 5.x + MySQL + Nginx + PHP-FPM 7.3

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2. Issue Discovery

On March 20, 2026, the platform experienced:

• Login functionality failure
• Abnormal page loading

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3. Technical Investigation

1. Malicious Code Injection

grep -r ‘clipboardData’ /www/wwwroot/dajian168.com/

Result: View.php was injected with a cryptocurrency theft script

2. SQL Injection Vulnerability

grep -n “$_POST” User.php

Result: Found 36 instances of direct $_POST usage

3. Backdoor Function

Discovered that curlfun() can be called remotely

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4. Remediation Plan (Core)

SQL Injection Fix

// Before (dangerous)
$payments = Db::table(‘lc_payments’)
->where(‘id = ‘.$_POST[‘type’])->find();

// After (secure)
$type_id = input(‘post.type/d’, 0);
$payments = Db::table(‘lc_payments’)
->where(‘id’, $type_id)->find();

Parameter Safety Mapping

| Original Syntax | Safe Syntax |
| ————— | ———————— |
| $_POST[‘type’] | input(‘post.type/d’, 0) |
| $_POST[‘money’] | input(‘post.money/f‘, 0) |
| $_POST[‘title’] | input(‘post.title’, ”) |

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5. Remediation Statistics

• SQL Injection: 36 instances ✅
• Malicious Code: 1 instance ✅
• Backdoor Function: 1 ✅

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6. Security Recommendations

1. Regular security audits
2. Timely framework updates
3. Configure PHP disable_functions
4. Enable log monitoring
5. Establish backup mechanisms

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