{"cve":"CVE-2021-41249","nvd":{"published":"2021-11-04T20:15:08.597","modified":"2026-06-17T04:08:10.460","status":"Modified","description":"GraphQL Playground is a GraphQL IDE for development of graphQL focused applications. All versions of graphql-playground-react older than graphql-playground-react@1.7.28 are vulnerable to compromised HTTP schema introspection responses or schema prop values with malicious GraphQL type names, exposing a dynamic XSS attack surface that can allow code injection on operation autocomplete. In order for the attack to take place, the user must load a malicious schema in graphql-playground. There are several ways this can occur, including by specifying the URL to a malicious schema in the endpoint query parameter. If a user clicks on a link to a GraphQL Playground installation that specifies a malicious server, arbitrary JavaScript can run in the user's browser, which can be used to exfiltrate user credentials or other harmful goals. If you are using graphql-playground-react directly in your client app, upgrade to version 1.7.28 or later.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","score":4.7},"cwes":["CWE-79"],"references":["https://github.com/graphql/graphiql/security/advisories/GHSA-x4r7-m2q9-69c8","https://github.com/graphql/graphql-playground/commit/b8a956006835992f12c46b90384a79ab82bcadad","https://github.com/graphql/graphql-playground/security/advisories/GHSA-59r9-6jp6-jcm7","https://github.com/graphql/graphiql/security/advisories/GHSA-x4r7-m2q9-69c8","https://github.com/graphql/graphql-playground/commit/b8a956006835992f12c46b90384a79ab82bcadad"],"products":["graphql:playground"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-41249","score":0.01221,"percentile":0.68714,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-59r9-6jp6-jcm7","url":"https://osv.dev/vulnerability/GHSA-59r9-6jp6-jcm7","summary":"XSS vulnerability in GraphQL Playground from untrusted schemas","modified":"2026-02-04T04:25:30.656417Z","packages":[{"ecosystem":"npm","name":"graphql-playground-react","purl":"pkg:npm/graphql-playground-react","ranges":["<1.7.28"],"fixed":["1.7.28"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}