A Stored Cross Site Scripting (XSS) vulnerability in Celk Sistemas Celk Saude v.3.1.252.1 allows a remote attacker to store JavaScript code inside a PDF file through the file upload feature. When the file is rendered, the injected code is executed on the user's browser.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.