Executive Summary

CVE-2025-11659 is an unauthenticated arbitrary file upload vulnerability in the ProjectsAndPrograms School Management System, specifically in the /assets/uploadNotes.php file. The vulnerability arises because the system does not properly validate or restrict the type of files uploaded via the 'File' argument, allowing attackers to upload malicious files such as PHP web shells. These files can be executed remotely, enabling attackers to run arbitrary code on the server without authentication. [1, 2]

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Impact Analysis

This vulnerability can lead to full remote code execution (RCE) on the affected server with web server privileges. Attackers can upload and execute malicious scripts, potentially compromising sensitive data such as personally identifiable information (PII), academic records, and system credentials. It can also result in server compromise, unauthorized content modification or deletion, service disruption, and reputational damage to the affected institution. [1, 2]

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Detection Guidance

This vulnerability can be detected by checking for the presence of the vulnerable endpoint /assets/uploadNotes.php on your system or network. You can use web scanning tools or simple curl commands to test if the endpoint is accessible and allows file uploads without authentication. Additionally, Google dorking with the query 'inurl:assets/uploadNotes.php' can help identify vulnerable targets externally. To detect exploitation attempts, monitor HTTP POST requests to /assets/uploadNotes.php with multipart/form-data content containing file uploads, especially those uploading PHP files. Example commands include: 1) curl -v -F "[email protected]" http://your-target/assets/uploadNotes.php to test file upload capability; 2) Using tools like wget or curl to check if uploaded files are accessible in /notesUploads/ directory; 3) Searching web server logs for POST requests to /assets/uploadNotes.php with suspicious file extensions or payloads. These steps help identify if the vulnerability exists and if exploitation attempts are occurring. [1, 2]

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Mitigation Strategies

Immediate mitigation steps include: 1) Restrict access to the /assets/uploadNotes.php endpoint to authenticated and authorized users only; 2) Implement strict server-side file validation by enforcing a whitelist of allowed file extensions (e.g., .pdf, .docx, .txt) and validating MIME types; 3) Rename uploaded files to random filenames without executable extensions to prevent direct execution; 4) Store uploaded files outside the web root or configure the web server to deny execution permissions in the upload directory (e.g., /notesUploads/); 5) Monitor and block suspicious upload attempts and HTTP requests to the vulnerable endpoint; 6) If possible, replace the affected component with a secure alternative product, as no known patches currently exist. These steps reduce the risk of arbitrary file upload and remote code execution. [2, 1]

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