Misstt123 Oasys Path Traversal Vulnerability in File Download Function

A path traversal vulnerability has been identified in Misstt123 Oasys version 1.0. The issue arises in the 'image' function of the '/show' endpoint, where improper input sanitization allows for arbitrary file downloads. This vulnerability can be exploited remotely, potentially leading to unauthorized access to sensitive information on the server.

Impact

Exploitation of this vulnerability allows for arbitrary file downloads, which could result in unauthorized access to sensitive information or system files.

Reproduction

To reproduce this vulnerability, send a request to the '/show' endpoint with a crafted 'startpath' parameter that includes '../' sequences. This will bypass the application's path filtering and allow access to files outside the intended directory. The downloaded file can then be used to gather information about the website or application, potentially leading to further exploitation.