CVE-2024-4717: School Management System XSS Vulnerability

CVE-2024-4717 Overview

A Cross-Site Scripting (XSS) vulnerability has been identified in Campcodes Complete Web-Based School Management System version 1.0. This issue affects the processing of the file /model/update_classroom.php, where improper handling of the name argument allows attackers to inject malicious scripts. The vulnerability can be exploited remotely by authenticated users, potentially leading to session hijacking, data theft, or unauthorized actions within the school management system.

Critical Impact

Attackers can inject malicious scripts through the classroom name parameter, potentially compromising user sessions and sensitive student/staff data in educational environments.

Affected Products

• Campcodes Complete Web-Based School Management System 1.0

Discovery Timeline

• May 14, 2024 - CVE-2024-4717 published to NVD
• February 19, 2025 - Last updated in NVD database

Technical Details for CVE-2024-4717

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting (XSS). The flaw exists in the /model/update_classroom.php file, which processes classroom update requests without properly sanitizing user-supplied input in the name parameter.

When an attacker submits a specially crafted payload containing JavaScript code through the classroom name field, the application stores or reflects this input without adequate encoding or validation. When other users (including administrators) view pages displaying this classroom name, the malicious script executes in their browser context.

Given that this is a school management system, successful exploitation could expose sensitive student records, grade information, and administrative credentials. The network-based attack vector with low complexity makes this vulnerability accessible to attackers with basic privileges in the system.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding in the update_classroom.php file. The application fails to sanitize the name argument before processing it, allowing HTML and JavaScript content to be accepted as valid input. Additionally, the application does not properly encode output when displaying classroom names, enabling stored or reflected XSS attacks.

Attack Vector

The attack is initiated remotely over the network by an authenticated user with access to the classroom management functionality. The attacker manipulates the name parameter in requests to /model/update_classroom.php, injecting malicious JavaScript code that will execute when the data is rendered in victim browsers.

Since the vulnerability requires low privileges (authenticated access) but no user interaction for the script execution phase, attackers could target administrators or other privileged users to escalate their access within the school management system.

For technical details regarding the exploitation methodology, refer to the GitHub XSS Vulnerability Report and the VulDB entry #263795.

Detection Methods for CVE-2024-4717

Indicators of Compromise

• Unusual JavaScript code or HTML tags appearing in classroom name fields within the database
• Suspicious HTTP requests to /model/update_classroom.php containing script tags or encoded payloads in the name parameter
• Browser developer console errors or unexpected script execution when viewing classroom listings
• User reports of unexpected behavior or pop-ups when accessing classroom management pages

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block XSS patterns in requests to /model/update_classroom.php
• Monitor HTTP request logs for common XSS payloads such as <script>, javascript:, onerror=, and encoded variants targeting the classroom update endpoint
• Deploy client-side Content Security Policy (CSP) headers to detect and report script injection attempts
• Conduct regular database audits to identify stored XSS payloads in classroom name fields

Monitoring Recommendations

• Enable detailed logging for all requests to the /model/ directory, particularly update_classroom.php
• Set up alerts for HTTP requests containing suspicious characters or encoding patterns in form parameters
• Monitor for unusual session activity following access to classroom management pages, which could indicate successful XSS exploitation
• Implement real-time alerting for CSP violation reports indicating inline script execution attempts

How to Mitigate CVE-2024-4717

Immediate Actions Required

• Restrict access to the classroom management functionality to only trusted administrative users until a patch is available
• Implement server-side input validation to reject any classroom names containing HTML or JavaScript code
• Apply output encoding (HTML entity encoding) when displaying classroom names throughout the application
• Deploy Content Security Policy (CSP) headers with strict inline script restrictions

Patch Information

No official vendor patch information is currently available for this vulnerability. Organizations using Campcodes Complete Web-Based School Management System 1.0 should contact the vendor directly for security updates or consider implementing the workarounds described below.

For additional vulnerability details, consult the VulDB CTI entry and the VulDB submission #331883.

Workarounds

• Implement a Web Application Firewall (WAF) with XSS protection rules to filter malicious input before it reaches the application
• Add server-side input validation to strip or reject HTML tags and JavaScript from the name parameter in update_classroom.php
• Apply HTML entity encoding to all user-supplied data when rendering classroom names in the user interface
• Limit access to classroom management features to a minimal set of trusted administrators
• Consider deploying the application in an isolated network segment to reduce exposure

# Example Apache configuration to add Content Security Policy headers
<IfModule mod_headers.c>
    Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'"
    Header set X-XSS-Protection "1; mode=block"
    Header set X-Content-Type-Options "nosniff"
</IfModule>