Giuseppe

When the Webform module is used with JSON:API enabled, submissions may be cached without varying correctly by the authenticated user. This occurs when a webform is configured to allow authenticated users to view their own submissions, potentially causing a request to the JSON:API webform submission collection endpoint to return a cached response generated for a different user. Consequently, an authenticated user may view another user's webform submission data. Approximately 436,300 instances of Drupal were identified globally as potentially exposed. This issue requires JSON:API to be enabled, the affected webform to expose submissions through JSON:API, and the attacker to possess an account with permissions to view their own submissions.

Incorrect authorization in the module allows forceful browsing. The module fails to sufficiently verify permissions for creating, viewing, and updating the parent webform when accessing REST endpoints. This issue requires the attacker to already possess permissions to use the REST resource.

The issue is related to a Missing Authorization vulnerability in the Download All Files module for the Drupal CMS, which allows for Forceful Browsing. This vulnerability can be exploited by a remote attacker to bypass security restrictions and perform a forceful browsing attack.