Path Traversal in wisp.serve_static allows arbitrary file read

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in gleam-wisp wisp allows arbitrary file read via percent-encoded path traversal. The wisp.serve_static function is vulnerable to path traversal because sanitization runs before percent-decoding. The encoded sequence %2e%2e passes through string.replace unchanged, then uri.percent_decode converts it to .., which the OS resolves as directory traversal when the file is read. An unauthenticated attacker can read any file readable by the application process in a single HTTP request, including application source code, configuration files, secrets, and system files. This issue affects wisp: from 2.1.1 before 2.2.1.

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对路径名的限制不恰当(路径遍历)

Wisp 安全漏洞

Wisp是Wisp开源的一个实用的Gleam web框架，用于快速开发，且易于维护。 Wisp 2.1.1版本至2.2.1之前版本存在安全漏洞，该漏洞源于wisp.serve_static函数存在路径遍历，可能导致任意文件读取。

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