{"id":"CVE-2026-54915","published":"2026-09-21T20:17:26.333","lastModified":"2026-09-21T20:17:26.463","description":"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 redirect_uri parameter but leaves tab, line-feed, and carriage-return characters intact. With the default root HTTP_ROOT 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 HTTP_ROOT configurations are not affected by this bypass. This issue is fixed in version 2.17.2.","cvssScore":5.4,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","cwes":["CWE-601"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Tautulli/Tautulli/commit/07f9beaa0286f1ab3b5e6be9726c5b2de07ee9dd","tags":[]},{"url":"https://github.com/Tautulli/Tautulli/releases/tag/v2.17.2","tags":[]},{"url":"https://github.com/Tautulli/Tautulli/security/advisories/GHSA-7c9r-fhj9-87xm","tags":[]}],"exploitRefs":[{"url":"https://github.com/Tautulli/Tautulli/commit/07f9beaa0286f1ab3b5e6be9726c5b2de07ee9dd","tags":[]},{"url":"https://github.com/Tautulli/Tautulli/releases/tag/v2.17.2","tags":[]},{"url":"https://github.com/Tautulli/Tautulli/security/advisories/GHSA-7c9r-fhj9-87xm","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows unauthenticated users to manipulate the redirect_uri parameter, leading to potential phishing attacks or unauthorized redirects outside Tautulli.","exploitability":"Exploitation requires a user to follow a crafted link; preconditions include an unpatched version of Tautulli prior to 2.17.2 and default HTTP_ROOT configuration.","blast_radius":"If exploited, this could result in data breaches or loss of control over user sessions, impacting privacy and security.","remediation":"Update Tautulli to version 2.17.2 or higher to mitigate the risk.","tags":["auth-bypass","phishing","redirect","web"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-22T06:26:08.587Z"}}