Understanding the Recent Critical Erlang SSH Vulnerability and Its Impact on Elixir Developers

The article discusses a critical vulnerability identified in the Erlang/OTP SSH server (CVE-2025-32433), which permits unauthenticated remote code execution. Developers using Elixir/Phoenix applications that deploy the SSH access using Erlang’s library may be at risk, although most default configurations do not expose the SSH daemon to the public internet. Users of embedded systems with Nerves and those manually exposing the SSH daemon may be more vulnerable. The content provides strategies for assessing exposure through port scanning tools like Nmap and details on the vulnerability's severity. Guidance on how to stay updated and secure is also given, highlighting patches available and recommendations for configurations that help mitigate risk.