CVE-2025-56427
📋 TL;DR
A directory traversal vulnerability in ComposioHQ v0.7.20 allows remote attackers to access sensitive files outside the intended directory via the _download_file_or_dir function. This affects all deployments running the vulnerable version, potentially exposing configuration files, credentials, or other sensitive data.
💻 Affected Systems
- ComposioHQ
📦 What is this software?
Composio by Composio
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through exposure of SSH keys, database credentials, configuration files with secrets, or other critical system files leading to lateral movement or data exfiltration.
Likely Case
Exposure of application configuration files, API keys, tokens, or user data stored in accessible directories, potentially enabling further attacks or data breaches.
If Mitigated
Limited exposure of non-critical files if proper file permissions and directory restrictions are in place, with minimal impact on overall system security.
🎯 Exploit Status
Public proof-of-concept demonstrates exploitation via crafted path traversal sequences in API requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Monitor official ComposioHQ channels for security updates. 2. Upgrade to a patched version when available. 3. Restart the ComposioHQ service after patching.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation to reject path traversal sequences (../, ..\) in file download requests.
# Modify the _download_file_or_dir function to validate and sanitize input paths
# Example Python snippet: if '..' in requested_path: return error
Web Application Firewall Rules
allConfigure WAF to block requests containing directory traversal patterns targeting the vulnerable endpoint.
# Example WAF rule to block ../ patterns
SecRule ARGS "\.\./" "id:1001,phase:2,deny,status:403,msg:'Directory Traversal Attempt'
🧯 If You Can't Patch
- Restrict network access to the ComposioHQ service using firewall rules to only allow trusted IP addresses.
- Implement strict file system permissions to limit the directories accessible to the ComposioHQ process.
🔍 How to Verify
Check if Vulnerable:
Test by sending a request to the vulnerable endpoint with a path traversal payload (e.g., /api/download?file=../../etc/passwd) and checking if restricted files are returned.Check Version:
Check the version in the ComposioHQ configuration or via the application's admin interface.Verify Fix Applied:
After applying mitigations, repeat the test with traversal payloads and verify that requests are blocked or return appropriate error messages.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing ../ or ..\ patterns
- Unusual file access patterns from the ComposioHQ process
- 403 or 400 errors indicating blocked traversal attempts
Network Indicators:
- HTTP requests with encoded traversal sequences (%2e%2e%2f)
- Multiple failed attempts to access restricted paths
SIEM Query:
source="composio.log" AND ("../" OR "..\\" OR "%2e%2e%2f")