In Eclipse Sphinx™ before version 0.13.1, Apache Xerces XML Parser was used without disabling processing of referenced external entities allowing the injection of arbitrary definitions which is able to access local files and expose their contents via HTTP requests.

SphinxSearch in Sphinx Technologies Sphinx through 3.1.1 allows directory traversal (in conjunction with CVE-2019-14511) because the mysql client can be used for CALL SNIPPETS and load_file operations on a full pathname (e.g., a file in the /etc directory). NOTE: this is unrelated to CMUSphinx.

Sphinx Technologies Sphinx 3.1.1 by default has no authentication and listens on 0.0.0.0, making it exposed to the internet (unless filtered by a firewall or reconfigured to listen to 127.0.0.1 only).