CVE-2024-46366
📋 TL;DR
This Client-side Template Injection vulnerability in Webkul Krayin CRM allows attackers to inject malicious template code during lead creation, which executes in users' browsers and can lead to privilege escalation. Attackers can gain elevated permissions within the CRM system. All users of Webkul Krayin CRM 1.3.0 are affected.
💻 Affected Systems
- Webkul Krayin CRM
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise where attackers gain administrative privileges, access sensitive customer data, modify system configurations, and potentially pivot to other systems.
Likely Case
Privilege escalation allowing attackers to access unauthorized CRM functions, steal sensitive lead/customer data, and manipulate business processes.
If Mitigated
Limited impact with proper input validation and output encoding preventing template injection, restricting attackers to basic user permissions.
🎯 Exploit Status
Exploit requires authenticated access to create leads, but the injection itself is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check Webkul's official channels for security updates. If no patch is available, implement workarounds immediately.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation on all lead creation fields to reject template injection patterns
Implement server-side validation to reject {{, }}, ${, and other template syntax in user inputs
Output Encoding
allApply proper output encoding when displaying user-controlled data in templates
Use HTML entity encoding or framework-specific encoding functions for all user inputs in templates
🧯 If You Can't Patch
- Restrict lead creation permissions to trusted users only
- Implement WAF rules to block template injection patterns in HTTP requests
🔍 How to Verify
Check if Vulnerable:
Test lead creation with payload containing {{7*7}} and check if 49 appears in rendered outputCheck Version:
Check CRM admin panel or package.json for version informationVerify Fix Applied:
Attempt the same test payload and verify it's properly sanitized or rejected📡 Detection & Monitoring
Log Indicators:
- Unusual lead creation patterns
- Template syntax in user input fields
- Multiple failed privilege escalation attempts
Network Indicators:
- HTTP POST requests to lead creation endpoints containing template syntax
- Unusual spike in lead creation activity
SIEM Query:
source="webkul_crm" AND (method="POST" AND uri="/leads/create" AND (body CONTAINS "{{" OR body CONTAINS "}}"))