OpenProject is the leading open source project management software. OpenProject utilizes `tablesorter` inside of the Cost Report feature. This dependency, when misconfigured, can lead to Stored XSS via `{icon}` substitution in table header values. This attack requires the permissions "Edit work packages" as well as "Add attachments". A project admin could attempt to escalate their privileges by sending this XSS to a System Admin. Otherwise, if a full System Admin is required, then this attack is significantly less impactful. By utilizing a ticket's attachment, you can store javascript in the application itself and bypass the application's CSP policy to achieve Stored XSS. This vulnerability has been patched in version(s) 14.1.0, 14.0.2 and 13.4.2.
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.