CVE-2025-45755
📋 TL;DR
A stored cross-site scripting vulnerability in Vtiger CRM Open Source Edition v8.3.0 allows attackers to inject malicious scripts via CSV file uploads in the Services Import feature. The vulnerability affects organizations using this specific version of Vtiger CRM, potentially compromising user sessions and data integrity. Attackers can execute arbitrary JavaScript in the context of other users' browsers.
💻 Affected Systems
- Vtiger CRM Open Source Edition
📦 What is this software?
⚠️ 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, credential theft, defacement of CRM interface, or data exfiltration from authenticated sessions.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy in place.
🎯 Exploit Status
Exploitation requires access to upload CSV files; detailed proof-of-concept available in public references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://www.vtiger.com/open-source-crm/
Restart Required: No
Instructions:
1. Check Vtiger website for security updates
2. Apply any available patches for v8.3.0
3. Verify input validation is properly implemented
🔧 Temporary Workarounds
Disable Services Import Feature
allTemporarily disable CSV import functionality for Services module
Modify Vtiger configuration to restrict import permissions
Implement Input Validation
allAdd server-side validation for CSV import data
Implement proper sanitization in ServicesImport.php or related modules
🧯 If You Can't Patch
- Restrict CSV upload permissions to trusted administrators only
- Implement web application firewall rules to block XSS payloads in CSV uploads
🔍 How to Verify
Check if Vulnerable:
Test by uploading a CSV file with Service Name field containing <script>alert('XSS')</script> and check if script executesCheck Version:
Check Vtiger version in Settings > About or via database queryVerify Fix Applied:
Attempt same test with patched version; script should be properly sanitized or blocked📡 Detection & Monitoring
Log Indicators:
- Unusual CSV uploads with script tags in Service Name field
- Multiple failed import attempts with special characters
Network Indicators:
- CSV file uploads containing JavaScript patterns
- Unusual outbound connections after CSV imports
SIEM Query:
source="vtiger_logs" AND ("CSV import" OR "Services Import") AND ("script" OR "javascript" OR "<" AND ">")