CVE-2024-23879
📋 TL;DR
CVE-2024-23879 is a stored cross-site scripting (XSS) vulnerability in Cups Easy Purchase & Inventory version 1.0 that allows attackers to inject malicious scripts via the description parameter in statemodify.php. This affects all users running the vulnerable version of this web application. Successful exploitation could lead to session hijacking and unauthorized access to the application.
💻 Affected Systems
- Cups Easy (Purchase & Inventory)
📦 What is this software?
Cups Easy by Ajaysharma
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session cookies, gain full control of the application, manipulate inventory data, and potentially pivot to other systems.
Likely Case
Attackers steal user session credentials to access sensitive purchase and inventory data, modify records, or perform unauthorized transactions.
If Mitigated
With proper input validation and output encoding, the attack is prevented, maintaining normal application functionality.
🎯 Exploit Status
Exploitation requires authenticated user interaction but uses common XSS techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-cups-easy
Restart Required: No
Instructions:
No official patch available. Apply workarounds or implement proper input validation and output encoding in the application code.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allDeploy WAF rules to block XSS payloads targeting the description parameter in statemodify.php
Input Validation Filter
allImplement server-side input validation to sanitize the description parameter
🧯 If You Can't Patch
- Restrict access to /cupseasylive/statemodify.php to trusted users only
- Implement Content Security Policy (CSP) headers to mitigate XSS impact
🔍 How to Verify
Check if Vulnerable:
Test if unsanitized HTML/JavaScript in the description parameter of statemodify.php executes in user browsersCheck Version:
Check application version in admin panel or configuration filesVerify Fix Applied:
Verify that HTML/JavaScript input in the description parameter is properly encoded and does not execute📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /cupseasylive/statemodify.php with script tags or JavaScript in parameters
Network Indicators:
- HTTP requests containing XSS payloads in description parameter
SIEM Query:
web.url:*statemodify.php* AND (web.param:*<script* OR web.param:*javascript:* OR web.param:*onerror=*)