Package Instance

silverstripe/framework code execution vulnerability
There is a vulnerability whereby arbitrary global functions may be executed if malicious user input is passed through to in the second argument of `ViewableData::renderWith`. This argument resolves associative arrays as template placeholders. This exploit requires that user code has been written which makes use of the second argument in `renderWith` and where user input is passed directly as a value in an associative array without sanitisation such as `Convert::raw2xml()`.

`ViewableData::customise` is not vulnerable.

silverstripe/framework allows upload of dangerous file types
Some potentially dangerous file types exist in File.allowed_extensions which could allow a malicious CMS user to upload files that then get executed in the security context of the website. We have removed the ability to upload .css, .js, .potm, .dotm, .xltm and .jar files in the default configuration. Since allowed_extensions are synced to webserver configuration (in assets/.htaccess) automatically, this will also deny access to any existing uploads with these extensions.

Review our security guidelines for the Common Web Platform and the File Security guide for SilverStripe 4 to find out how to add or remove extensions.

silverstripe/framework sends passwords back to browsers under some circumstances
Under some circumstances a form may populate a PasswordField with submitted data, reflecting submitted data back to a user. The user will only see their own submissions for password data, which is not considered best practice. We are not aware of data leaks to other users, devices or sessions.