silverstripe/silverstripe-framework · Security
Silverstripe Framework: Possible XSS attack through media embed
- GHSA ID
- GHSA-gvrw-qqp5-jgc5
- CVE ID
- CVE-2026-54720
- Severity
- medium
- Published
- Updated
- CVSS
- 5.4 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CVSS v3
- 5.4 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
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
CWEs
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- https://github.com/silverstripe/silverstripe-framework/security/advisories/GHSA-gvrw-qqp5-jgc5 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-54720 ↗
- https://github.com/silverstripe/silverstripe-framework/pull/11993 ↗
- https://github.com/silverstripe/silverstripe-framework/commit/1bcb02adfc365c6436dc26ab2f6dd32d97f3979b ↗
- https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2026-54720.yaml ↗
- https://github.com/silverstripe/silverstripe-framework/releases/tag/6.2.2 ↗
- https://www.silverstripe.org/download/security-releases/cve-2026-54720 ↗
- https://github.com/advisories/GHSA-gvrw-qqp5-jgc5 ↗