GHSA-rhx4-hvx9-j387
Silverstripe Framework has a XSS vulnerability in HTML editor
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | silverstripe/framework | < 5.3.23 | 5.3.23 |
Details
As written in the advisory (Markdown source, shown as plain text).
### 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
References
External links from the advisory. They lead to third-party sites.
- https://github.com/silverstripe/silverstripe-framework/security/advisories/GHSA-rhx4-hvx9-j387
- https://nvd.nist.gov/vuln/detail/CVE-2025-30148
- https://github.com/silverstripe/silverstripe-framework/pull/11682
- https://github.com/silverstripe/silverstripe-framework/commit/e99cfd62d160d145a76fcf9631e6b11226e42358
- https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2025-30148.yaml
- https://github.com/silverstripe/silverstripe-framework
- https://www.silverstripe.org/download/security-releases/cve-2025-30148