{"id":"CVE-2020-4038","aliases":["GHSA-4852-vrh7-28rf"],"url":"https://o3.security/vulnerability/CVE-2020-4038","summary":"Reflected XSS in GraphQL Playground","details":"GraphQL Playground (graphql-playground-html NPM package) before version 1.6.22 have a severe XSS Reflection attack vulnerability. All unsanitized user input passed into renderPlaygroundPage() method could trigger this vulnerability. This has been patched in graphql-playground-html version 1.6.22. Note that some of the associated dependent middleware packages are also affected including but not limited to graphql-playground-middleware-express before version 1.7.16, graphql-playground-middleware-koa before version 1.6.15, graphql-playground-middleware-lambda before version 1.7.17, and graphql-playground-middleware-hapi before 1.6.13.","published":"2020-06-08T21:15:09.923Z","modified":"2026-07-08T06:00:07.177838369Z","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"graphql-playground-html","fixedVersion":"1.6.22"}],"fix":{"url":"https://github.com/prisma-labs/graphql-playground/commit/bf1883db538c97b076801a60677733816cb3cfb7","label":"prisma-labs/graphql-playground@bf1883d"},"references":[{"type":"ADVISORY","url":"https://github.com/prisma-labs/graphql-playground#security-details"},{"type":"ADVISORY","url":"https://github.com/prisma-labs/graphql-playground/security/advisories/GHSA-4852-vrh7-28rf"},{"type":"FIX","url":"https://github.com/prisma-labs/graphql-playground/commit/bf1883db538c97b076801a60677733816cb3cfb7"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T06:00:07.177838369Z"}}