CVE-2025-47949
📋 TL;DR
A Signature Wrapping vulnerability in samlify allows attackers to forge SAML authentication responses and impersonate any user. This affects all applications using samlify for SAML-based single sign-on prior to version 2.10.0. Attackers need a valid signed XML document from the identity provider to exploit this vulnerability.
💻 Affected Systems
- samlify
📦 What is this software?
Samlify by Samlify Project
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of SAML authentication allowing attackers to log in as any user, including administrators, potentially leading to full system takeover.
Likely Case
Unauthorized access to applications using SAML authentication, potentially exposing sensitive data and functionality.
If Mitigated
Limited impact with proper network segmentation and additional authentication layers, but SAML trust is still broken.
🎯 Exploit Status
Exploitation requires a valid signed XML document from the identity provider and understanding of SAML Signature Wrapping attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.10.0
Vendor Advisory: https://github.com/tngan/samlify/security/advisories/GHSA-r683-v43c-6xqv
Restart Required: Yes
Instructions:
1. Update samlify to version 2.10.0 or later using npm update samlify. 2. Restart your Node.js application. 3. Verify the update was successful.
🔧 Temporary Workarounds
XML Signature Validation Enhancement
allImplement additional XML signature validation checks to detect wrapping attacks
npm install xml-crypto
Implement custom signature validation using xml-crypto library
🧯 If You Can't Patch
- Implement additional authentication factors (MFA) for all SAML-authenticated applications
- Monitor SAML authentication logs for unusual patterns and implement rate limiting on SAML endpoints
🔍 How to Verify
Check if Vulnerable:
Check package.json or run npm list samlify to see if version is below 2.10.0Check Version:
npm list samlify | grep samlifyVerify Fix Applied:
Verify samlify version is 2.10.0 or higher using npm list samlify📡 Detection & Monitoring
Log Indicators:
- Multiple authentication attempts with different user IDs from same SAML response
- Unusual user privilege escalation via SAML
Network Indicators:
- Unusual SAML response sizes or structures
- Multiple authentication requests from single source
SIEM Query:
source="saml_auth" AND (event_type="authentication" AND user_id="*" AND result="success") | stats count by src_ip, user_id | where count > threshold