{"id":"GHSA-67g8-c724-8mp3","aliases":["CVE-2023-28104"],"title":"DDOS attack on graphql endpoints","description":"An attacker could use a specially crafted graphql query to execute a Distributed Denial of Service attack (DDOS attack) against a website. This mostly affects websites with publicly exposed and particularly large/complex graphql schemas.\n\nIf your Silverstripe CMS project does not expose a public facing graphql schema, a user account is required to trigger the DDOS attack. If your site is hosted behind a content delivery network (CDN), such as Imperva or CloudFlare, this will likely further mitigate the risk.\n\nUpgrade to `silverstripe/graphql` 4.2.3 or 4.1.2 or above to remedy the vulnerability.","severity":"high","score":7.5,"published":"2023-03-16T17:22:17.000Z","modified":"2026-09-10T03:49:52.722Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"silverstripe/graphql","ranges":[{"events":[{"introduced":"4.1.1"},{"fixed":"4.1.2"}],"type":"ECOSYSTEM"}],"versions":["4.1.1"],"fixed":["4.1.2"]},{"ecosystem":"Packagist","name":"silverstripe/graphql","ranges":[{"events":[{"introduced":"4.2.2"},{"fixed":"4.2.3"}],"type":"ECOSYSTEM"}],"versions":["4.2.2"],"fixed":["4.2.3"]}],"references":["https://github.com/silverstripe/silverstripe-graphql/security/advisories/GHSA-67g8-c724-8mp3","https://nvd.nist.gov/vuln/detail/CVE-2023-28104","https://github.com/silverstripe/silverstripe-graphql/pull/526","https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/graphql/CVE-2023-28104.yaml","https://github.com/silverstripe/silverstripe-graphql","https://github.com/silverstripe/silverstripe-graphql/releases/tag/4.1.2","https://github.com/silverstripe/silverstripe-graphql/releases/tag/4.2.3","https://www.silverstripe.org/download/security-releases/CVE-2023-28104"],"sources":[{"name":"OSV","id":"GHSA-67g8-c724-8mp3","modified":"2026-09-10T03:49:52.722157040Z","url":"https://osv.dev/vulnerability/GHSA-67g8-c724-8mp3"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5}]}