WWBN AVideo is an open source video platform. In versions up to and including 26.0, the restreamer endpoint constructs a log file path by embedding user-controlled "users_id" and "liveTransmitionHistory_id" values from the JSON request body without any sanitization. This log file path is then concatenated directly into shell commands passed to "exec()", allowing an authenticated user to achieve arbitrary command execution on the server via shell metacharacters such as "$()" or backticks. Commit 99b865413172045fef6a98b5e9bfc7b24da11678 contains a patch.