CVE-2024-33983
📋 TL;DR
This is a Cross-Site Scripting (XSS) vulnerability in School Attendance Monitoring System and School Event Management System version 1.0. An attacker can craft malicious URLs containing JavaScript in the 'Attendance', 'attenddate', and 'YearLevel' parameters to steal session cookies when victims visit the compromised '/AttendanceMonitoring/report/attendance_print.php' page. This affects all users of these vulnerable school management systems.
💻 Affected Systems
- School Attendance Monitoring System
- School Event Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session cookies, gain full system access, manipulate attendance/event data, and potentially compromise the entire school's sensitive information.
Likely Case
Attackers steal user session cookies to impersonate teachers or staff, modify attendance records, or access personal student information.
If Mitigated
With proper input validation and output encoding, the attack fails, and only legitimate attendance reports are displayed.
🎯 Exploit Status
XSS vulnerabilities are commonly weaponized. The attack requires crafting URLs with malicious parameters, which is straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-janobe-products
Restart Required: No
Instructions:
Check the vendor advisory for updates. If no patch exists, implement workarounds like input validation and output encoding in the PHP code.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side validation and sanitization for the 'Attendance', 'attenddate', and 'YearLevel' parameters in attendance_print.php to reject or clean malicious input.
Modify PHP code to use functions like htmlspecialchars() or filter_var() on user inputs before processing.
Web Application Firewall (WAF) Rules
allDeploy WAF rules to block requests containing suspicious JavaScript patterns in the vulnerable parameters.
Configure WAF to detect and block XSS payloads in query parameters targeting the affected endpoint.
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to prevent execution of inline scripts.
- Disable or restrict access to the '/AttendanceMonitoring/report/attendance_print.php' endpoint if not essential.
🔍 How to Verify
Check if Vulnerable:
Test by accessing the URL with a harmless payload like 'attendance_print.php?Attendance=<script>alert('test')</script>' and check if script executes.Check Version:
Check system documentation or admin panel for version information; version 1.0 is confirmed vulnerable.Verify Fix Applied:
Retest with the same payload; the script should not execute, and input should be properly encoded or rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual long or encoded strings in 'Attendance', 'attenddate', 'YearLevel' parameters in web server logs for attendance_print.php.
- Multiple failed login attempts or session hijacking alerts following suspicious URL accesses.
Network Indicators:
- HTTP requests to attendance_print.php with script tags or JavaScript code in query parameters.
- Outbound connections to external domains from the server that correlate with XSS payload execution.
SIEM Query:
source="web_server" AND uri="/AttendanceMonitoring/report/attendance_print.php" AND (query="*<script>*" OR query="*javascript:*")