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.
Remediation
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