Package Instance

Reflected Cross Site Scripting (XSS) in error message
If a website has been set to the "dev" environment mode, a URL can be provided which includes an XSS payload which will be executed in the resulting error message.

Quadratic blowup in Convert::xml2array()
Silverstripe silverstripe/framework 4.x until 4.10.9 has a quadratic blowup in Convert::xml2array() that enables a remote attack via a crafted XML document.

Silverstripe Framework has a XSS in form messages
In some cases, form messages can contain HTML markup. This is an intentional feature, allowing links and other relevant HTML markup for the given message.

Some form messages include content that the user can provide. There are scenarios in the CMS where that content doesn't get correctly sanitised prior to being included in the form message, resulting in an XSS vulnerability.

Silverstripe Framework has a XSS vulnerability in HTML editor
A bad actor with access to edit content in the CMS could send a specifically crafted encoded payload to the server, which could be used to inject a JavaScript payload on the front end of the site. The payload would be sanitised on the client-side, but server-side sanitisation doesn't catch it.

The server-side sanitisation logic has been updated to sanitise against this attack.

Cross-site Scripting
In SilverStripe asset-admin, there is XSS in file titles managed through the CMS.

Silverstripe Framework has a XSS via insert media remote file oembed
When using the "insert media" functionality, the linked oEmbed JSON includes an HTML attribute which will replace the embed shortcode. The HTML is not sanitized before replacing the shortcode, allowing a script payload to be executed on both the CMS and the front-end of the website.

Silverstripe Framework has a Reflected Cross Site Scripting (XSS) in error message
> [!IMPORTANT]
> This vulnerability only affects sites which are in the "dev" environment mode. If your production website is in "dev" mode, it has been misconfigured, and you should immediately swap it to "live" mode.
> See https://docs.silverstripe.org/en/developer_guides/debugging/environment_types/ for more information.

If a website has been set to the "dev" environment mode, a URL can be provided which includes an XSS payload which will be executed in the resulting error message.

Exposure of Sensitive Information to an Unauthorized Actor
Silverstripe Framework is the framework that forms the base of the Silverstripe content management system. Prior to versions 4.13.39 and 5.1.11, if a user should not be able to see a record, but that record can be added to a `GridField` using the `GridFieldAddExistingAutocompleter` component, the record's title can be accessed by that user. Versions 4.13.39 and 5.1.11 contain a fix for this issue.

URL Redirection to Untrusted Site ('Open Redirect')
Silverstripe Framework is the Model-View-Controller framework that powers the Silverstripe content management system. Prior to version 4.12.15, an attacker can display a link to a third party website on a login screen by convincing a legitimate content author to follow a specially crafted link. Users should upgrade to Silverstripe Framework 4.12.15 or above to address the issue.

Improper Privilege Management
In SilverStripe, there is access escalation for CMS users with limited access through permission cache pollution.

Session Fixation
SilverStripe allows session fixation in the "change password" form.