Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to 2.17.2, the unauthenticated /auth/redirect endpoint in plexpy/webauth.py removes forward slashes from the user-controlled redirecturi parameter but leaves tab, line-feed, and carriage-return characters intact. With the default root HTTPROOT configuration, CherryPy HTTPRedirect passes the resulting value to urllib.parse.urljoin, which can resolve the whitespace-bearing path to an attacker-controlled external origin. A user who follows a crafted link can therefore be redirected outside Tautulli for phishing or post-login redirect-flow abuse, while custom non-root HTTPROOT configurations are not affected by this bypass. This issue is fixed in version 2.17.2.

data/interfaces/default/history.html in Tautulli 2.1.26 has XSS via a crafted Plex username that is mishandled when constructing the History page.

In Tautulli 2.1.9, CSRF in the /shutdown URI allows an attacker to shut down the remote media server. (Also, anonymous access can be achieved in applications that do not have a user login area).