CVE-2024-4514: School Management System XSS Vulnerability

CVE-2024-4514 Overview

CVE-2024-4514 is a reflected cross-site scripting (XSS) vulnerability in Campcodes Complete Web-Based School Management System 1.0. The flaw resides in the /view/timetable_insert_form.php script, where the grade parameter is rendered without proper output encoding or input sanitization. Remote attackers can craft a malicious URL that, when opened by an authenticated user, executes attacker-controlled JavaScript in the victim's browser session. The issue has been publicly disclosed under VulDB identifier 263118, and working exploit details are available in the public domain.

Critical Impact
Successful exploitation allows attackers to steal session cookies, hijack authenticated administrator sessions, deface pages, or redirect users to malicious payloads within the school management portal.

Affected Products

Campcodes Complete Web-Based School Management System 1.0
Deployments exposing /view/timetable_insert_form.php to untrusted users
Installations that have not applied vendor mitigations for the grade parameter

Discovery Timeline

2024-05-06 - CVE-2024-4514 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-4514

Vulnerability Analysis

The vulnerability is a classic reflected cross-site scripting issue classified under [CWE-79]. The timetable_insert_form.php endpoint accepts the grade HTTP parameter and reflects its value directly into the HTML response without contextual output encoding. Because the response is rendered in the user's browser as part of the trusted application origin, injected script executes with the privileges of the current session.

Exploitation requires user interaction, typically a victim clicking a crafted link. The attack can be delivered over the network without authentication, but the injected script gains value only when executed in the browser of a logged-in user such as a school administrator or teacher. Successful payloads can exfiltrate session tokens, perform actions on behalf of the victim, or pivot to further attacks against the management interface.

Root Cause

The root cause is the absence of input validation and output encoding on the grade query string parameter. The application concatenates user-supplied data into the HTML response, allowing HTML and JavaScript metacharacters to break out of their intended context. No Content Security Policy or output filtering mitigates the injection.

Attack Vector

An attacker crafts a URL that appends a JavaScript payload to the grade parameter of /view/timetable_insert_form.php. The attacker then delivers the link through phishing email, chat, or a compromised web page. When an authenticated user opens the link, the browser renders the reflected payload and executes it within the application's origin. Additional technical details are available in the GitHub XSS Vulnerability Report and the VulDB entry #263118.

Detection Methods for CVE-2024-4514

Indicators of Compromise

HTTP GET requests to /view/timetable_insert_form.php containing grade= values with <script>, onerror=, onload=, or URL-encoded equivalents (%3Cscript%3E).
Web server access logs showing unusually long or encoded grade parameter values originating from external IP addresses.
Outbound browser requests from staff workstations to unfamiliar domains immediately after visiting the school management portal.

Detection Strategies

Deploy Web Application Firewall (WAF) rules that flag reflected XSS patterns targeting the grade parameter on /view/timetable_insert_form.php.
Enable server-side request logging with full query strings and alert on payloads containing HTML tags or JavaScript event handlers.
Correlate anomalous session cookie access, session reuse from new IPs, and administrator account activity following inbound links.

Monitoring Recommendations

Monitor HTTP logs for parameter tampering on all /view/ endpoints, not only timetable_insert_form.php.
Track referrer headers and user-agent anomalies for administrator sessions accessing the school management portal.
Alert on any browser-side script errors or Content Security Policy violations reported by staff endpoints.

How to Mitigate CVE-2024-4514

Immediate Actions Required

Restrict access to the school management application to trusted networks or place it behind a VPN until a patched build is available.
Deploy a WAF rule that rejects requests to /view/timetable_insert_form.php when the grade parameter contains HTML tags or JavaScript keywords.
Force-rotate session cookies and administrator credentials if suspicious inbound links have been observed.

Patch Information

No vendor security advisory or official patch is listed in the public references for Campcodes Complete Web-Based School Management System 1.0 at the time of NVD publication. Administrators should contact the vendor directly and review the VulDB submission #329695 for any updated remediation guidance. Until an official fix is published, apply the compensating controls described in this article.

Workarounds

Sanitize and HTML-encode the grade parameter server-side using a vetted encoding library before echoing it into the response.
Implement a strict Content Security Policy that disallows inline scripts and restricts script sources to the application origin.
Set the HttpOnly and Secure flags on session cookies to reduce impact if a payload executes.
Train staff to avoid clicking unsolicited links that reference the school management portal.

bash

# Example Nginx WAF-style rule to block reflected XSS on the grade parameter
location /view/timetable_insert_form.php {
    if ($arg_grade ~* "(<|%3C)\s*script|onerror=|onload=|javascript:") {
        return 403;
    }
}