Outsystems Cross-Site Request Forgery

** DISPUTED ** OutSystems Platform 10 through 11 allows ImageResourceDetail.aspx CSRF for content modifications and file uploads. NOTE: The product is self-hosted by the customer, even though it has a *.outsystemsenterprise.com domain name.) NOTE: The vendor claims that the independent researcher created the report without any type of validation and that no such vulnerability exists. (2019-12-31, CVE-2019-12273)

The absence of Anti-CSRF tokens may lead to a Cross-Site Request Forgery attack that can result in executing a specific application action as another logged in user, e.g. steal their account by changing their email and password or silently adding a new admin user account when executed from the administrator account.

The attacker may copy one of your web application forms, e.g. email/password change form.

The webpage will contain a form with the exact set of fields as the original application but with input values already provided and the submit button replaced with a Javascript code causing auto-submission. When the page is accessed the form will be immediately submitted and page contents replaced with a valid content or a redirect to your original application.

One of your application users who is already logged in can be then tricked to navigate to such malicious page e.g. by clicking a link in a phishing email, and the pre-populated form content will be submitted to your application like it would be submitted by your user.