In my web application, I have a textarea where users can input any text that is saved as a string in the database. The issue arises when users enter Javascript code into the textarea, as it will execute when viewed on the saved data page. Is there a universal method to prevent this security vulnerability?
When displaying input from a user, it is crucial to always escape it properly. Simply removing <script> tags is not sufficient. It is important to take the input as given by the user and store it securely before displaying it again.
There are various methods for escaping content based on the specific framework or platform being used. In fact, many templating solutions already have built-in functionality for this purpose.
UPDATE
Although I am not well-versed in the Stripes framework, a quick search revealed this resource:
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