MoviePilot v2 contains a server-side request forgery vulnerability in the image proxy endpoint that allows authenticated attackers to request arbitrary URLs by supplying a resourcetoken cookie and a URL whose domain matches the assembled allowlist. Attackers can bypass internal network protections because the SecurityUtils.issafeurl function performs only domain-membership checking without blocking private, loopback, or link-local addresses, enabling enumeration of internal services such as Jellyfin, Emby, or Plex and exfiltration of data from internal network resources.