youtube-dl vulnerable to file system modification and RCE through improper file-extension sanitization

Description This advisory follows the security advisory GHSA-79w7-vh3h-8g4j published by the yt-dlp/yt-dlp project to aid remediation of the issue in the ytdl-org/youtube-dl project. Vulnerability youtube-dl does not limit the extensions of downloaded files, which could lead to arbitrary filename...