What is CVE-2026-54720?

CVE-2026-54720 is a medium-severity vulnerability in Silverstripe Silverstripe-framework, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-01.

How severe is CVE-2026-54720?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Silverstripe Silverstripe-framework

CVE-2026-54720

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 vers…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Silverstripe Silverstripe-framework — versions < 6.2.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-54720?: CVE-2026-54720 is a medium-severity vulnerability in Silverstripe Silverstripe-framework, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-01.
How severe is CVE-2026-54720?: Medium severity. CVSS v3 base score is 5.4 out of 10.