CVE-2026-54720

Silverstripe Framework: Possible XSS attack through media embed

State: Published
Severity: 5.4 Medium
Published: Jul 1, 2026
Updated: Jul 2, 2026
Reserved: Jun 15, 2026

Description

Silverstripe Framework is a PHP framework which powers the Silverstripe CMS. In versions prior to 6.2.2, the "Insert media from web" functionality in the CMS is vulnerable to XSS from a specially crafted embed. This issue was fixed in version 6.2.2/

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
silverstripe-frameworksilverstripe	< 6.2.2Affected

References

https://github.com/silverstripe/silverstripe-framework/security/advisories/GHSA-gvrw-qqp5-jgc5
https://www.silverstripe.org/download/security-releases/cve-2026-54720

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