CVE-2023-50266 Bazarr Blind Server-Side Request Forgery (SSRF) in the /test/<protocol>/ endpoint

Bazarr manages and downloads subtitles. In version 1.2.4, the proxy method in bazarr/bazarr/app/ui.py does not validate the user-controlled protocol and url variables and passes them to requests.get without any sanitization, which leads to a blind server-side request forgery SSRF. This issue allo...