CVE-2025-30148: Silverstripe Framework

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

Silverstripe Framework is a PHP framework which powers the Silverstripe CMS. Prior to 5.3.23, 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 sanitized on the client-side, but server-side sanitization doesn't catch it. The server-side sanitization logic has been updated to sanitize against this attack. This vulnerability is fixed in 5.3.23.

Affected products

• Silverstripe Framework: up to and including 5.3.23

Published 2025-04-10. Last modified 2026-06-17.