CVE-2025-27507
📋 TL;DR
Zitadel's Admin API contains Insecure Direct Object Reference (IDOR) vulnerabilities that allow authenticated users without proper IAM roles to modify sensitive settings, including LDAP configurations. The most critical impact is manipulation of LDAP authentication settings, potentially allowing attackers to bypass authentication or gain unauthorized access. Organizations using Zitadel with LDAP authentication are at highest risk.
💻 Affected Systems
- Zitadel
📦 What is this software?
Zitadel by Zitadel
Zitadel by Zitadel
Zitadel by Zitadel
Zitadel by Zitadel
Zitadel by Zitadel
Zitadel by Zitadel
Zitadel by Zitadel
Zitadel by Zitadel
⚠️ Risk & Real-World Impact
Worst Case
Attackers could modify LDAP configurations to redirect authentication to malicious servers, potentially compromising all user accounts and gaining administrative access to the Zitadel instance.
Likely Case
Authenticated users without proper privileges could modify various system settings, potentially disabling security features, altering user permissions, or changing authentication methods.
If Mitigated
With proper role-based access controls and network segmentation, impact would be limited to unauthorized setting changes within the authenticated user's scope.
🎯 Exploit Status
Exploitation requires authenticated access but no special privileges. The vulnerability is in the Admin API endpoints.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.71.0, 2.70.1, 2.69.4, 2.68.4, 2.67.8, 2.66.11, 2.65.6, 2.64.5, or 2.63.8
Vendor Advisory: https://github.com/zitadel/zitadel/security/advisories/GHSA-f3gh-529w-v32x
Restart Required: Yes
Instructions:
1. Backup your Zitadel configuration and data. 2. Stop the Zitadel service. 3. Update to one of the patched versions using your package manager or deployment method. 4. Restart the Zitadel service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Restrict Admin API Access
allLimit network access to Zitadel's Admin API endpoints to only trusted administrative networks
Use firewall rules to restrict access to Zitadel Admin API ports (typically 8080)
Disable LDAP if Not Used
allIf LDAP authentication is not required, disable it completely to mitigate the most severe attack vector
Use Zitadel configuration to disable LDAP authentication
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Zitadel Admin API from general user access
- Enforce principle of least privilege by reviewing and minimizing all user permissions, especially Admin API access
🔍 How to Verify
Check if Vulnerable:
Check Zitadel version against affected versions list. If using LDAP, test if non-admin users can modify LDAP settings via Admin API.Check Version:
zitadel version or check Zitadel web interface admin panelVerify Fix Applied:
After patching, verify the version is updated and test that non-admin users cannot modify sensitive settings via Admin API endpoints.📡 Detection & Monitoring
Log Indicators:
- Unauthorized Admin API access attempts
- LDAP configuration changes from non-admin users
- Failed authentication attempts followed by Admin API access
Network Indicators:
- Unusual Admin API traffic patterns
- LDAP configuration modification requests from non-admin IPs
SIEM Query:
source="zitadel" AND (event_type="admin_api_access" OR event_type="ldap_config_change") AND user_role!="admin"