Mitigation Strategies

Immediate mitigation steps include restricting access to /assets/editNotes.php to authenticated users only, implementing strict file validation by allowing only a whitelist of safe file extensions (such as .pdf, .docx, .txt) and verifying MIME types, renaming uploaded files to prevent execution by using random filenames without original extensions, and storing uploaded files outside the web root or configuring the web server to deny execution permissions in the upload directory. [1]

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Executive Summary

CVE-2025-11656 is an unauthenticated arbitrary file upload vulnerability in the ProjectsAndPrograms School Management System, specifically in the /assets/editNotes.php file. Attackers can remotely upload malicious files, such as PHP scripts, via the 'file' parameter without any authentication or proper validation. The uploaded files are stored in a publicly accessible directory and can be executed directly, allowing attackers to run arbitrary code on the server. [1]

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Impact Analysis

This vulnerability can lead to severe impacts including remote code execution with web server privileges, full server compromise, unauthorized access to sensitive data such as personally identifiable information (PII) of students and staff, modification or deletion of website content, service disruption, and potential use of the compromised server to launch further attacks within the network. It also poses reputational and regulatory risks to the affected institution. [1]

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Compliance Impact

The vulnerability can lead to unauthorized access and potential exposure of sensitive personal data, including PII of students and staff, which may result in non-compliance with data protection regulations such as GDPR and HIPAA. This exposure can trigger legal and regulatory consequences for the affected organization. [1]

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Detection Guidance

This vulnerability can be detected by attempting to upload a malicious PHP file via the /assets/editNotes.php endpoint using a multipart/form-data POST request with the 'file' parameter. You can test if the server accepts and executes uploaded PHP files by uploading a simple web shell (e.g., shell.php containing `<?php eval($_POST["pass"]); ?>`) and then accessing it via HTTP to execute commands. Network detection can include monitoring HTTP POST requests to /assets/editNotes.php with file uploads and checking for unusual files in the /notesUploads/ directory. Commands to detect might include using curl to upload a test PHP file and then accessing it, for example: 1) `curl -F "[email protected]" http://target/assets/editNotes.php` 2) `curl http://target/notesUploads/shell.php` to verify execution. [1]

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