CVE-2025-70890
📋 TL;DR
A stored XSS vulnerability in Cyber Cafe Management System v1.0 allows authenticated attackers to inject malicious JavaScript into username fields. This code executes in victims' browsers when viewing affected pages, potentially compromising user sessions or stealing credentials. Systems running this specific software version are affected.
💻 Affected Systems
- Cyber Cafe Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals admin credentials, takes full control of the system, accesses sensitive customer data, and potentially compromises connected systems.
Likely Case
Session hijacking, credential theft from users viewing malicious usernames, defacement of user management pages.
If Mitigated
Limited to authenticated users only, with potential for privilege escalation if lower-privileged users can target admins.
🎯 Exploit Status
Exploit requires authenticated access. GitHub repository contains proof-of-concept.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Implement input validation and output encoding in add-users.php and related files.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement server-side validation of username parameter and HTML encode output
Modify add-users.php to validate username input and use htmlspecialchars() or similar when displaying usernames
Content Security Policy
allImplement CSP headers to restrict script execution
Add header: Content-Security-Policy: script-src 'self'
🧯 If You Can't Patch
- Restrict access to user management functions to trusted administrators only
- Implement web application firewall rules to block XSS payloads in username parameter
🔍 How to Verify
Check if Vulnerable:
Test by entering <script>alert('XSS')</script> as username in add-users.php and check if it executes when viewing user listCheck Version:
Check software version in admin panel or readme filesVerify Fix Applied:
Test with same payload after implementing fixes - script should not execute and should appear as plain text📡 Detection & Monitoring
Log Indicators:
- Unusual username entries containing script tags or JavaScript code
- Multiple failed login attempts followed by successful login with suspicious username
Network Indicators:
- POST requests to add-users.php with script payloads in parameters
SIEM Query:
source="web_logs" AND (uri="/add-users.php" AND (param="username" CONTAINS "<script>" OR param="username" CONTAINS "javascript:"))