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Is Your VoIP System Finally Safe from Attackers? A Proven Guide to Securing Your FreePBX Endpoint.
A critical security vulnerability, identified as CVE-2025-57819, affects the FreePBX Endpoint Manager. This issue is serious because it allows an attacker to take full control of your phone system without needing a password. If you use FreePBX, you must take action to protect your communications and data.
What Is FreePBX?
FreePBX is a widely used open-source platform that provides a graphical interface for the Asterisk Voice over IP (VoIP) phone system. Think of it as a control panel for your internet-based phone network. It is flexible and powerful, making it a popular choice for home users, businesses, and even large enterprises looking for an alternative to services like Microsoft Teams. Because much of the code is open, users can easily inspect and modify it.
The Security Flaw Explained
The vulnerability allows an unauthenticated attacker to perform an SQL injection. In simple terms, this means a person from the outside can send hidden, malicious commands to your system’s database. Since no password is required, the barrier to entry is extremely low. Successfully exploiting this flaw lets the attacker run any code they want on your server. This gives them complete remote control over your entire phone system.
This issue was uncovered after system administrators began reporting strange behavior and configuration errors in online forums around August 2025. It was soon confirmed that an unknown vulnerability was being actively exploited on a large scale.
What Information Is at Risk?
A compromised FreePBX system is a significant security breach. An attacker who gains control can access your organization’s most sensitive communications. The risks include:
- Listening to live phone calls.
- Accessing and downloading all voicemail messages.
- Stealing call logs and historical recordings.
- Using the compromised phone system to launch further attacks on your internal network.
How to Protect Your System
You must update your FreePBX Endpoint Manager immediately to fix this security hole. The problem affects multiple major versions of the software.
Vulnerable Versions
Endpoint Manager versions 15, 16, and 17 are all at risk.
Patched Version
The vulnerability has been fixed in the following versions or any newer releases:
- Version 15.0.66
- Version 16.0.89
- Version 17.0.3
Check your current version of the Endpoint Manager and install the required update right away. Taking this step is essential to secure your system and protect your privacy.