MEDIUM
The severity rating is medium due to the potential for data breaches and unauthorized access if Vendel is not properly secured. In homelab environments, the risk is moderate as users can closely monitor configurations, but in production settings, a compromised gateway could expose sensitive information.

Vendel is a self-hosted SMS gateway that allows users to send text messages from their own infrastructure, bypassing the need for third-party services such as Twilio. The software aims to provide a lightweight and cost-effective solution for home automation and personal projects, offering more control over message routing and handling. However, with any open-source project, there are inherent security risks associated with self-hosted solutions, especially when dealing with sensitive data like phone numbers and content of messages. Users must ensure that their implementation is secure against potential vulnerabilities in the software itself or misconfigurations on their end.

Affected Systems
  • Vendel
Affected Versions: all versions
Remediation
  • Ensure that the software is running on a secure network with firewalls configured to block unauthorized access.
  • Regularly update Vendel to the latest version available, as security patches are often released to address newly discovered vulnerabilities.
  • Configure strong authentication methods for accessing the SMS gateway, such as two-factor authentication (2FA).
  • Monitor logs and implement intrusion detection systems to quickly respond to any suspicious activity.
Stack Impact

In homelab stacks using Vendel, users must ensure that their network configurations are secure. Common issues include misconfigured firewalls or weak passwords that can lead to unauthorized access.

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