CVE-2025-4210
📋 TL;DR
This critical vulnerability in Casdoor allows attackers to bypass authorization checks when creating users via the SCIM endpoint. Attackers can remotely exploit this to create unauthorized user accounts with potentially elevated privileges. All Casdoor instances up to version 1.811.0 are affected.
💻 Affected Systems
- Casdoor
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers create administrative accounts, gain full control over the identity management system, and potentially compromise connected systems.
Likely Case
Unauthorized user creation leading to privilege escalation, data access, and lateral movement within the environment.
If Mitigated
Limited to attempted unauthorized access attempts that are logged and blocked by network controls.
🎯 Exploit Status
The vulnerability details are public in the patch commit, making reverse engineering possible. No public exploit code has been identified yet.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.812.0
Vendor Advisory: https://github.com/casdoor/casdoor/releases/tag/v1.812.0
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Stop the Casdoor service. 3. Upgrade to version 1.812.0 using package manager or manual installation. 4. Restart the Casdoor service. 5. Verify the patch is applied by checking the version.
🔧 Temporary Workarounds
Disable SCIM Endpoint
allTemporarily disable the vulnerable SCIM user creation endpoint if not required.
Modify Casdoor configuration to disable SCIM functionality or block access to /scim endpoints
Network Access Control
linuxRestrict access to SCIM endpoints using firewall rules or WAF.
iptables -A INPUT -p tcp --dport [casdoor_port] -m string --string "/scim" --algo bm -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Casdoor instances from untrusted networks
- Deploy a Web Application Firewall (WAF) with rules to detect and block SCIM endpoint exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check Casdoor version: if version ≤ 1.811.0 and SCIM endpoint is enabled, the system is vulnerable.Check Version:
Check Casdoor web interface admin panel or application logs for version informationVerify Fix Applied:
Verify version is 1.812.0 or higher and test SCIM user creation with proper authorization checks.📡 Detection & Monitoring
Log Indicators:
- Unauthorized SCIM user creation attempts
- User creation from unexpected IP addresses
- Failed authorization logs for SCIM endpoints
Network Indicators:
- Unusual POST requests to /scim endpoints
- User creation requests without proper authentication headers
SIEM Query:
source="casdoor.log" AND (uri_path="/scim" OR uri_path="/scim/*") AND (http_method="POST" OR http_method="PUT") AND NOT auth_success="true"