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CVE-2026-88988 XSS via SVG data URI

CVE-2026-88988 XSS via SVG data URI

Severity:
Medium (?)
Identifier:
CVE-2026-88988
Versions Affected:
silverstripe/framework: < 6.2.13
Versions Fixed:
silverstripe/framework: 6.2.13
Release Date:
2026-10-28

The HTML sanitiser did not remove SVG data URIs. A CMS author could store content that runs JavaScript in the browser of another user who views it.

Base CVSS: 5.4
Reported by: HDWSec - https://hdwsec.fr