SilverStripe Framework through 4.10.8 allows XSS, inside of script tags that can can be added to website content via XHR by an authenticated CMS user if the cwp-core module is not installed on the sanitise_server_side contig is not set to true in project code.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-25238
• https://forum.silverstripe.org/c/releases
• https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2022-25238.yaml
• https://www.silverstripe.org/blog/tag/release
• https://www.silverstripe.org/download/security-releases/
• https://www.silverstripe.org/download/security-releases/cve-2022-25238
• https://docs.silverstripe.org/en/4/changelogs/4.10.1/