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The vulnerability CVE-2025-63214 is caused by an improper access control (CWE-284) flaw within the account management functions of the bridgetech VBC Server & Element Manager. The firmware fails to enforce proper authentication or authorization checks on specific HTTP endpoints or API calls responsible for creating and deleting user accounts. An unauthorized remote attacker can exploit this by crafting and sending network requests, such as HTTP POST or GET commands, directly to these vulnerable interfaces. No user interaction or prior privileges are required, as the attack complexity is low and the attacker is unauthenticated (PR:N). The requests manipulate parameters like username and action to execute arbitrary account creation or deletion. This breach of integrity allows attackers to insert new administrative accounts for persistent access or delete legitimate accounts to cause a denial of service. The impact is scored on integrity and availability, as confidentiality is not directly affected (C:N/I:L/A:L).
Platform: bridgetech VBC Server
Version: 6.5.0-9
Vulnerability: Unauthorized account manipulation
Severity: MEDIUM
date: 2025-11-19
Prediction: 2026-01-19
What Undercode Say
Network discovery for VBC Server nmap -p 80,443,8080 <target_ip> -sV Testing for unprotected endpoints (example patterns) curl -X POST http://<target_ip>/api/addUser -d "username=attacker&password=pwd123&role=admin" curl -X GET http://<target_ip>/cgi-bin/deleteUser.cgi?user=admin Checking for default or common paths gobuster dir -u http://<target_ip> -w /usr/share/wordlists/common.txt
How Exploit
Attackers send crafted HTTP requests to the web management interface of the VBC Server without any credentials. The exploit targets specific API endpoints or CGI scripts that handle user management, such as `/api/addUser` or /cgi-bin/userManage.cgi. By submitting parameters for a new username, password, and role, an attacker can create a privileged account. Similarly, sending a request with a `delete` action and a target username parameter can remove existing accounts. The attack is network-based (AV:N) and requires no special conditions (AC:L).
Protection from this CVE
Network Segmentation: Isolate the VBC Server from untrusted networks, especially the internet.
Access Control Lists: Implement strict firewall rules to limit management interface access to authorized IPs only.
Virtual Patching: Use a Web Application Firewall (WAF) to block malicious requests to account management paths.
Vendor Update: Apply the official firmware patch from bridgetech when released.
Impact
Successful exploitation compromises system integrity and availability. Attackers can establish persistent backdoor access with administrative privileges, leading to full system compromise. They can also delete legitimate user accounts, disrupting operations and causing denial of service.
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Sources:
Reported By: nvd.nist.gov
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