Package Instance

Silverstripe CMS XSS Vulnerability
In SilverStripe through 4.5, malicious users with a valid Silverstripe CMS login (usually CMS access) can craft profile information which can lead to XSS for other users through specially crafted login form URLs.

silverstripe/framework has Cross-site Scripting vulnerability in page history comparison
Authenticated user with page edit permission can craft HTML, which when rendered in a page history comparison can execute client scripts.

Incorrect Authorization
Default SilverStripe GraphQL Server (aka silverstripe/graphql) permission checker is not inherited by query subclass.

Missing Authorization
Silverstripe Framework is the Model-View-Controller framework that powers the Silverstripe content management system. Prior to version 4.12.15, the GridField print view incorrectly validates the permission of DataObjects potentially allowing a content author to view records they are not authorised to access. Users should upgrade to Silverstripe Framework 4.12.15 or above to address the issue.

Silverstipe CMS Stored XSS in custom meta tags
A malicious content author could create a custom meta tag and execute an arbitrary JavaScript payload. This would require convincing a legitimate user to access a page and enter a custom keyboard shortcut.
This requires CMS access to exploit.

Improper Input Validation
Silverstripe Framework is the MVC framework that powers Silverstripe CMS. When a new member record is created and a password is not set, an empty encrypted password is generated. As a result, if someone is aware of the existence of a member record associated with a specific email address, they can potentially attempt to log in using that empty password. Although the default member authenticator and login form require a non-empty password, alternative authentication methods might still permit a successful login with the empty password. This issue has been patched in versions 4.13.4 and 5.0.13.

Session fixation in change password form
SilverStripe through 4.3.3 allows session fixation in the "change password" form.

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.

### References

- https://www.silverstripe.org/download/security-releases/cve-2024-53277

## Reported by

Leo Diamat from [Bastion Security Group](http://www.bastionsecurity.co.nz/)