GitHub Advisoryadvisory · Packagist
GHSA-gvrw-qqp5-jgc5 Silverstripe Framework: Possible XSS attack through media embed
MEDIUM
Official page ↗
- Aliases
- CVE-2026-54720
- Ecosystem
- Packagist
- Packages
- silverstripe/framework
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- Weaknesses
- CWE-79
- Reviewed
- 2026-08-27
Affected packages
• Packagist silverstripe/framework: < 6.2.2 → fixed in 6.2.2
Description
Impact
The "Insert media from web" functionality in the CMS is vulnerable to XSS from a specially crafted embed.
Reported by
Jack Wallace from Bastion Security
Related
Alias · CVE (1)
- CVE-2026-54720 Silverstripe Framework is a PHP framework which powers the Silverstripe CMS. vulnerability
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://github.com/silverstripe/silverstripe-framework/security/advisories/GHSA-gvrw-qqp5-jgc5 web
- https://nvd.nist.gov/vuln/detail/CVE-2026-54720 advisory
- https://github.com/silverstripe/silverstripe-framework/pull/11993 web
- https://github.com/silverstripe/silverstripe-framework/commit/1bcb02adfc365c6436dc26ab2f6dd32d97f3979b web
- https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2026-54720.yaml web
- https://github.com/silverstripe/silverstripe-framework package
- https://github.com/silverstripe/silverstripe-framework/releases/tag/6.2.2 web
- https://www.silverstripe.org/download/security-releases/cve-2026-54720 web