CVE-2025-30148
Silverstripe Framework has a XSS vulnerability in HTML editor
Description
### Impact 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. ### Reported by James Nicoll from Fujitsu Cyber ### References - https://www.silverstripe.org/download/security-releases/cve-2025-30148
How to fix CVE-2025-30148
To remediate CVE-2025-30148, upgrade the affected package to a fixed version below.
- —upgrade to 5.3.23 or later
Is CVE-2025-30148 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 5.3.23
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |