GoDoxy is a reverse proxy and container orchestrator for self-hosters. Prior to version 0.27.5, the file content API endpoint at "/api/v1/file/content" is vulnerable to path traversal. The "filename" query parameter is passed directly to "path.Join(common.ConfigBasePath, filename)" where "ConfigBasePath = "config"" (a relative path). No sanitization or validation is applied beyond checking that the field is non-empty ("binding:"required""). An authenticated attacker can use "../" sequences to read or write files outside the intended "config/" directory, including TLS private keys, OAuth refresh tokens, and any file accessible to the container's UID. Version 0.27.5 fixes the issue.