### Key Information Summary #### Vulnerability Name SourceCodester Human Resource Information System /Superadmin_Dashboard/process/editemployee_process.php Unrestricted Upload Vulnerability #5 #### Affected Product - SourceCodester Human Resource Information System #### Vulnerability Type Unrestricted Upload Vulnerability #### Root Cause - Lack of strict validation and restrictions on uploaded file types, allowing attackers to upload arbitrary files. #### Impact - Attackers can exploit this vulnerability to upload malicious files (such as WebShells), enabling them to execute arbitrary code on the target system and gain full control over the server. #### Description - The vulnerability exists in the `editemployee_process.php` file. Due to the absence of proper validation and filtering for uploaded files, attackers can bypass security checks by uploading malicious files, ultimately leading to arbitrary code execution on the server. #### Vulnerability Details and POC - **Vulnerable Location**: `editemployee_process.php` - **POC**: A detailed Python script is provided to demonstrate how to exploit the vulnerability by uploading malicious files and executing commands. #### Recommended Remediation Measures 1. **Enhance File Upload Validation**: - Implement a whitelist mechanism, allowing only specific file types to be uploaded. - Conduct strict checks on file extensions and content. 2. **Increase Security Checks**: - Perform virus scanning before file upload. - Prohibit the upload of executable files and script files. 3. **Other Security Measures**: - Regularly update and maintain the system to patch known vulnerabilities. - Apply the principle of least privilege, restricting unnecessary file operation permissions. ``` These key details can help security teams quickly understand and respond to the vulnerability, implementing appropriate protective measures.