CVE-2025-48486
📋 TL;DR
FreeScout versions before 1.8.180 contain a cross-site scripting (XSS) vulnerability in the Session::flash and __ functions due to insufficient input validation and sanitization. This allows attackers to inject malicious scripts that execute in users' browsers when viewing affected pages. All FreeScout instances running vulnerable versions are affected.
💻 Affected Systems
- FreeScout
📦 What is this software?
Freescout by Freescout
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on user systems.
Likely Case
Session hijacking leading to unauthorized access to help desk data, customer information theft, or defacement of the application interface.
If Mitigated
Limited impact with proper content security policies and input validation at other layers, though XSS could still execute in some contexts.
🎯 Exploit Status
XSS exploitation typically requires user interaction (clicking a malicious link) but is technically straightforward once the injection point is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.8.180
Vendor Advisory: https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-9jpm-xrpc-cv66
Restart Required: Yes
Instructions:
1. Backup your FreeScout installation and database. 2. Update to version 1.8.180 via the built-in updater or manual download. 3. Restart your web server (Apache/Nginx) and PHP-FPM if applicable. 4. Clear browser caches and test functionality.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources and mitigate XSS impact.
Add to web server config: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
For Apache: Header always set Content-Security-Policy "default-src 'self'"
For Nginx: add_header Content-Security-Policy "default-src 'self';" always;
Web Application Firewall Rules
allConfigure WAF to block XSS patterns in input parameters.
ModSecurity rule: SecRule ARGS "<script" "id:1001,phase:2,deny,status:403,msg:'XSS Attack Detected'"
🧯 If You Can't Patch
- Implement strict input validation at the application layer for all user-supplied data.
- Deploy a web application firewall (WAF) with XSS protection rules enabled.
🔍 How to Verify
Check if Vulnerable:
Check FreeScout version in admin panel or via file inspection: grep -r "version" app/config/app.phpCheck Version:
php artisan --version | grep FreeScout || cat app/config/app.php | grep versionVerify Fix Applied:
Confirm version is 1.8.180 or higher in admin dashboard and test XSS payloads in Session::flash and __ functions.📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests with script tags or JavaScript code in parameters
- Multiple failed login attempts followed by successful login from different IP
Network Indicators:
- HTTP requests containing <script>, javascript:, or eval() in URL parameters or form data
SIEM Query:
source="web_logs" AND (http_uri="*<script>*" OR http_uri="*javascript:*" OR http_post_data="*<script>*")