CVE-2024-23881
📋 TL;DR
CVE-2024-23881 is a stored Cross-Site Scripting (XSS) vulnerability in Cups Easy version 1.0 that allows remote attackers to inject malicious scripts via the description parameter in statelist.php. This could enable session cookie theft when authenticated users view the compromised page. Only users running Cups Easy version 1.0 are affected.
💻 Affected Systems
- Cups Easy (Purchase & Inventory)
📦 What is this software?
Cups Easy by Ajaysharma
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover leading to data theft, privilege escalation, and potential lateral movement within the application.
Likely Case
Session hijacking allowing unauthorized access to the victim's account and sensitive purchase/inventory data.
If Mitigated
Limited impact with proper input validation and output encoding preventing script execution.
🎯 Exploit Status
Exploitation requires social engineering to trick authenticated users into visiting malicious URLs or viewing injected content.
🛠️ 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. Implement workarounds and consider upgrading to a secure version if released.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement server-side validation and HTML encoding for the description parameter in statelist.php
Modify /cupseasylive/statelist.php to sanitize user input using htmlspecialchars() or similar functions
Web Application Firewall (WAF) Rules
allDeploy WAF rules to block XSS payloads targeting the description parameter
Configure WAF to detect and block patterns like <script>, javascript:, and common XSS payloads
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Restrict access to /cupseasylive/statelist.php to only necessary users
🔍 How to Verify
Check if Vulnerable:
Test by submitting a payload like <script>alert('XSS')</script> in the description parameter of statelist.php and check if it executesCheck Version:
Check application version in admin panel or configuration filesVerify Fix Applied:
Verify that submitted scripts are properly encoded and do not execute in browser📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /cupseasylive/statelist.php with script tags or encoded payloads
- Multiple failed login attempts followed by successful access to vulnerable endpoint
Network Indicators:
- HTTP requests containing <script> tags or javascript: URIs in description parameter
SIEM Query:
source="web_logs" AND uri="/cupseasylive/statelist.php" AND (description CONTAINS "<script>" OR description CONTAINS "javascript:")