{"id":"GHSA-gvrw-qqp5-jgc5","summary":"Silverstripe Framework: Possible XSS attack through media embed","details":"### Impact\nThe \"Insert media from web\" functionality in the CMS is vulnerable to XSS from a specially crafted embed.\n\n### Reported by\nJack Wallace from Bastion Security","aliases":["CVE-2026-54720"],"modified":"2026-08-27T17:00:40.953971822Z","published":"2026-08-27T16:49:47Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-08-27T16:49:47Z","nvd_published_at":"2026-07-01T21:17:03Z","cwe_ids":["CWE-79"]},"references":[{"type":"WEB","url":"https://github.com/silverstripe/silverstripe-framework/security/advisories/GHSA-gvrw-qqp5-jgc5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54720"},{"type":"WEB","url":"https://github.com/silverstripe/silverstripe-framework/pull/11993"},{"type":"WEB","url":"https://github.com/silverstripe/silverstripe-framework/commit/1bcb02adfc365c6436dc26ab2f6dd32d97f3979b"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2026-54720.yaml"},{"type":"PACKAGE","url":"https://github.com/silverstripe/silverstripe-framework"},{"type":"WEB","url":"https://github.com/silverstripe/silverstripe-framework/releases/tag/6.2.2"},{"type":"WEB","url":"https://www.silverstripe.org/download/security-releases/cve-2026-54720"}],"affected":[{"package":{"name":"silverstripe/framework","ecosystem":"Packagist","purl":"pkg:composer/silverstripe/framework"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.2.2"}]}],"versions":["2.4.10","2.4.11","2.4.12","2.4.13","2.4.9","2.5.0","3.0.10","3.0.10-rc1","3.0.11","3.0.11-rc1","3.0.12","3.0.13","3.0.14","3.0.2.1","3.0.3","3.0.3-rc1","3.0.3-rc2","3.0.4","3.0.5","3.0.6","3.0.6-rc1","3.0.6-rc2","3.0.7","3.0.7-rc1","3.0.8","3.0.9","3.0.9-rc1","3.1.0","3.1.0-beta1","3.1.0-beta2","3.1.0-beta3","3.1.0-rc1","3.1.0-rc2","3.1.0-rc3","3.1.1","3.1.10","3.1.10-rc1","3.1.10-rc2","3.1.11","3.1.11-rc1","3.1.12","3.1.13","3.1.13-rc1","3.1.14","3.1.14-rc1","3.1.15","3.1.16","3.1.16-rc1","3.1.17","3.1.17-rc1","3.1.17-rc2","3.1.18","3.1.18-rc1","3.1.18-rc2","3.1.19","3.1.19-rc1","3.1.2","3.1.2-rc1","3.1.20","3.1.20-rc1","3.1.20-rc2","3.1.21","3.1.3","3.1.3-rc1","3.1.3-rc2","3.1.4","3.1.4-rc1","3.1.5","3.1.5-rc1","3.1.6","3.1.6-rc1","3.1.6-rc2","3.1.6-rc3","3.1.7","3.1.7-rc1","3.1.8","3.1.9","3.1.9-rc1","3.2.0","3.2.0-beta1","3.2.0-beta2","3.2.0-rc1","3.2.0-rc2","3.2.1","3.2.1-rc1","3.2.1-rc2","3.2.2","3.2.2-rc1","3.2.2-rc2","3.2.3","3.2.3-rc1","3.2.3-rc2","3.2.4","3.2.4-rc1","3.2.5","3.2.5-rc1","3.2.5-rc2","3.2.6","3.3.0","3.3.0-beta1","3.3.0-rc1","3.3.0-rc2","3.3.0-rc3","3.3.1","3.3.1-rc1","3.3.1-rc2","3.3.2","3.3.2-rc1","3.3.3","3.3.3-rc1","3.3.3-rc2","3.3.4","3.4.0","3.4.0-rc1","3.4.1","3.4.1-rc1","3.4.1-rc2","3.4.2","3.4.3","3.4.3-rc1","3.4.4","3.4.4-rc1","3.4.5","3.4.5-rc1","3.4.6","3.4.6-rc1","3.4.6-rc2","3.5.0","3.5.0-rc1","3.5.0-rc2","3.5.0-rc3","3.5.1","3.5.1-rc1","3.5.1-rc2","3.5.2","3.5.2-rc1","3.5.3","3.5.3-rc1","3.5.4","3.5.4-rc1","3.5.5","3.5.5-beta1","3.5.5-beta2","3.5.6","3.5.6-rc1","3.5.7","3.5.8","3.5.8-rc1","3.6.0","3.6.0-beta1","3.6.0-beta2","3.6.0-rc1","3.6.1","3.6.1-alpha2","3.6.2","3.6.2-beta1","3.6.2-beta2","3.6.3","3.6.3-rc2","3.6.4","3.6.5","3.6.6","3.6.6-rc1","3.6.7","3.6.8","3.7.0","3.7.1","3.7.1-rc1","3.7.2","3.7.3","3.7.4","3.7.5","3.7.6","3.7.7","4.0.0","4.0.0-alpha1","4.0.0-alpha2","4.0.0-alpha3","4.0.0-alpha4","4.0.0-alpha5","4.0.0-alpha6","4.0.0-alpha7","4.0.0-beta1","4.0.0-beta2","4.0.0-beta3","4.0.0-beta4","4.0.0-rc1","4.0.0-rc2","4.0.0-rc3","4.0.1","4.0.1-rc1","4.0.2","4.0.3","4.0.4","4.0.5","4.0.6","4.0.7","4.1.0","4.1.0-rc1","4.1.0-rc2","4.1.1","4.1.2","4.1.3","4.1.4","4.1.5","4.10.0","4.10.0-beta1","4.10.0-rc1","4.10.1","4.10.10","4.10.11","4.10.2","4.10.3","4.10.4","4.10.5","4.10.6","4.10.7","4.10.8","4.10.9","4.11.0","4.11.0-beta1","4.11.0-beta2","4.11.0-beta3","4.11.0-rc1","4.11.1","4.11.10","4.11.11","4.11.12","4.11.13","4.11.14","4.11.15","4.11.16","4.11.2","4.11.3","4.11.4","4.11.5","4.11.6","4.11.7","4.11.8","4.11.9","4.12.0","4.12.0-beta1","4.12.0-rc1","4.12.1","4.12.2","4.12.3","4.12.4","4.12.5","4.12.6","4.12.7","4.13.0","4.13.0-beta1","4.13.0-rc1","4.13.1","4.13.10","4.13.11","4.13.12","4.13.13","4.13.14","4.13.15","4.13.16","4.13.17","4.13.18","4.13.19","4.13.2","4.13.20","4.13.21","4.13.22","4.13.23","4.13.24","4.13.25","4.13.26","4.13.27","4.13.28","4.13.29","4.13.3","4.13.30","4.13.31","4.13.32","4.13.33","4.13.34","4.13.35","4.13.36","4.13.37","4.13.38","4.13.39","4.13.4","4.13.40","4.13.41","4.13.42","4.13.43","4.13.44","4.13.5","4.13.6","4.13.7","4.13.8","4.13.9","4.2.0","4.2.0-beta1","4.2.1","4.2.2","4.2.3","4.2.4","4.2.5","4.3.0","4.3.0-rc1","4.3.1","4.3.2","4.3.3","4.3.4","4.3.5","4.4.0","4.4.0-rc1","4.4.1","4.4.2","4.4.3","4.4.4","4.4.5","4.4.6","4.4.7","4.5.0","4.5.0-alpha1","4.5.0-rc1","4.5.0-rc2","4.5.1","4.5.2","4.5.3","4.5.4","4.6.0","4.6.0-beta1","4.6.0-rc1","4.6.1","4.6.2","4.7.0","4.7.0-beta1","4.7.0-rc1","4.7.1","4.7.2","4.7.3","4.7.4","4.8.0","4.8.0-beta1","4.8.0-rc1","4.8.1","4.9.0","4.9.0-alpha1","4.9.0-beta1","4.9.0-rc1","4.9.1","4.9.2","4.9.3","4.9.4","5.0.0","5.0.0-alpha1","5.0.0-beta1","5.0.0-beta2","5.0.0-beta3","5.0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