Package Instance

Improper Privilege Management
When using the REST API, users without the correct permission can post comments via REST that are approved even if the user does not have permission to post approved comments. This issue only affects sites that have the RESTful Web Services (rest) module enabled, the comment entity REST resource enabled, and where an attacker can access a user account on the site with permissions to post comments, or where anonymous users can post comments.

Moderately critical - Third-party libraries - SA-CORE-2019-007
The `PharStreamWrapper` (aka `phar-stream-wrapper`) package does not prevent directory traversal, which allows attackers to bypass a deserialization protection mechanism, as demonstrated by a `phar:///path/bad.phar/../good.phar` URL.

Improper Input Validation
A remote code execution vulnerability exists in PHP's built-in phar stream wrapper when performing file operations on an untrusted `phar://` URI. Some Drupal code (core, contrib, and custom) may be performing file operations on insufficiently validated user input, thereby being exposed to this vulnerability. This vulnerability is mitigated by the fact that such code paths typically require access to an administrative permission or an atypical configuration.

Files uploaded by anonymous users accessed by other users
Private files that have been uploaded by an anonymous user but not permanently attached to content on the site should only be visible to the anonymous user that uploaded them, rather than all anonymous users. Drupal core does not provide this protection, allowing an access bypass vulnerability to occur. This issue is mitigated by the fact that in order to be affected, the site must allow anonymous users to upload files into a private file system.

Drupal External URL injection through URL aliases leading to Open Redirect
The path module in Drupal allows users with the 'administer paths' to create pretty URLs for content.
In certain circumstances the user can enter a particular path that triggers an open redirect to a malicious url.