Silverstripe Framework is a PHP framework which powers the Silverstripe CMS. 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. This issue has been addressed in silverstripe/framework version 5.3.8 and users are advised to upgrade. There are no known workarounds for this vulnerability.

silverstripe-asset-admin is a silverstripe assets gallery for asset management. 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. This issue has been addressed in silverstripe/framework version 5.3.8 and users are advised to upgrade. There are no known workarounds for this vulnerability.

Silverstripe framework is the PHP framework forming the base for the Silverstripe CMS. In affected versions a bad actor with access to edit content in the CMS could add 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 type of attack in version 5.2.16. All users are advised to upgrade. There are no known workarounds for this vulnerability.

silverstripe/reports is an API for creating backend reports in the Silverstripe Framework. In affected versions reports can be accessed by their direct URL by any user who has access to view the reports admin section, even if the `canView()` method for that report returns `false`. This issue has been addressed in version 5.2.3. All users are advised to upgrade. There are no known workarounds for this vulnerability.

Silverstripe Form Capture provides a method to capture simple silverstripe forms and an admin interface for users. Starting in version 0.2.0 and prior to versions 1.0.2, 1.1.0, 2.2.5, and 3.1.1, improper escaping when presenting stored form submissions allowed for an attacker to perform a Cross-Site Scripting attack. The vulnerability was initially patched in version 1.0.2, and version 1.1.0 includes this patch. The bug was then accidentally re-introduced during a merge error, and has been re-patched in versions 2.2.5 and 3.1.1. There are no known workarounds for this vulnerability.

A vulnerability was found in webbuilders-group silverstripe-kapost-bridge 0.3.3. It has been declared as critical. Affected by this vulnerability is the function index/getPreview of the file code/control/KapostService.php. The manipulation leads to sql injection. The attack can be launched remotely. Upgrading to version 0.4.0 is able to address this issue. The patch is named 2e14b0fd0ea35034f90890f364b130fb4645ff35. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-220471.

Silverstripe silverstripe/cms through 4.11.0 allows XSS.

In SilverStripe Framework through 2022-04-07, Stored XSS can occur in javascript link tags added via XMLHttpRequest (XHR).

Silverstripe silverstripe/framework through 4.10 allows Session Fixation.

Silverstripe silverstripe/framework 4.8.1 has a quadratic blowup in Convert::xml2array() that enables a remote attack via a crafted XML document.