EUVD-2026-17190CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
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3Description
Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the /pms_image_proxy endpoint accepts a user-supplied img parameter and forwards it to Plex Media Server's /photo/:/ transcode transcoder without authentication and without restricting the scheme or host. The endpoint is intentionally excluded from all authentication checks in webstart.py, any value of img beginning with http is passed directly to Plex, this causes the Plex Media Server process, which typically runs on the same host or internal network as Tautulli, with access to RFC-1918 address space, to issue an outbound HTTP request to any attacker-specified URL. This issue has been patched in version 2.17.0.
Analysis
Server-Side Request Forgery (SSRF) in Tautulli prior to version 2.17.0 allows remote attackers to forge outbound HTTP requests from the Plex Media Server process via the unauthenticated /pms_image_proxy endpoint, potentially exposing internal services on RFC-1918 address space and enabling reconnaissance or attacks against systems accessible from the Plex server's network context.
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