CVE-2025-64421
8.0 HIGH
📋 TL;DR
This vulnerability allows low-privileged users in Coolify to invite themselves as administrators through a race condition exploit. By clicking the invite button twice, they can bypass authorization checks and gain administrative access to the Coolify instance. All Coolify instances running vulnerable versions are affected.
💻 Affected Systems
Products:
- Coolify
Versions: All versions up to and including v4.0.0-beta.434
Operating Systems: All platforms running Coolify
Default Config Vulnerable:
⚠️ Yes
Notes: Any Coolify instance with user accounts is vulnerable. The vulnerability requires at least one low-privileged user account to exploit.
📦 What is this software?
Coolify by Coollabs
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⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the Coolify instance with administrative privileges, allowing attackers to manage all servers, applications, and databases, potentially leading to full infrastructure takeover.
Likely Case
Unauthorized administrative access leading to privilege escalation, allowing attackers to modify configurations, deploy malicious applications, or access sensitive data.
If Mitigated
Limited impact if proper network segmentation and monitoring are in place, though privilege escalation would still occur.
🌐 Internet-Facing: HIGH - If Coolify is exposed to the internet, attackers with any user account can exploit this vulnerability.
🏢 Internal Only: HIGH - Even internally, any compromised low-privileged account can escalate to administrator.
🎯 Exploit Status
Public PoC:
✅ No
Weaponized:
LIKELY
Unauthenticated Exploit:
✅ No
Complexity:
LOW
Exploitation requires a low-privileged user account and involves a simple race condition (double-clicking invite button). No advanced technical skills needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://github.com/coollabsio/coolify/security/advisories/GHSA-4p6r-m39m-9cm9
Restart Required: Yes
Instructions:
1. Monitor the GitHub security advisory for patch availability. 2. When patch is released, update to the fixed version. 3. Restart the Coolify service after updating.
🔧 Temporary Workarounds
Disable user invitations
allTemporarily disable the user invitation functionality in Coolify to prevent exploitation.
Restrict user management
allLimit user account creation and management to trusted administrators only.
🧯 If You Can't Patch
- Isolate Coolify instance from the internet and restrict access to trusted networks only.
- Implement strict monitoring of user invitation logs and administrative privilege changes.
🔍 How to Verify
Check if Vulnerable:
Check your Coolify version. If it's v4.0.0-beta.434 or earlier, you are vulnerable.Check Version:
Check the Coolify web interface dashboard or run 'docker ps' if using Docker to see the container version.Verify Fix Applied:
After patching, verify the version is newer than v4.0.0-beta.434 and test that low-privileged users cannot invite administrators.📡 Detection & Monitoring
Log Indicators:
- Multiple invitation attempts from low-privileged users
- Administrative user invitations from non-admin accounts
- Password reset requests for newly created admin accounts
Network Indicators:
- Unusual authentication patterns
- Multiple POST requests to invitation endpoints
SIEM Query:
source="coolify" AND (event="user_invitation" AND user_role="member") OR (event="password_reset" AND new_user_role="admin")