CVE-2020-4038
GraphQL Playground (graphql-playground-html NPM package) before version 1.6.22 have a severe XSS Reflection attack vulnerability.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.4 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
- EPSS
- 7.24% probability · 94th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- prisma/graphql-playground-html · prisma/graphql-playground-middleware-express · prisma/graphql-playground-middleware-hapi · prisma/graphql-playground-middleware-koa · prisma/graphql-playground-middleware-lambda
- Source
- security-advisories@github.com
EPSS 7.2% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/prisma-labs/graphql-playground#security-detailsThird Party Advisory
- https://github.com/prisma-labs/graphql-playground/commit/bf1883db538c97b076801a60677733816cb3cfb7Patch, Third Party Advisory
- https://github.com/prisma-labs/graphql-playground/security/advisories/GHSA-4852-vrh7-28rfMitigation, Third Party Advisory
- https://github.com/prisma-labs/graphql-playground#security-detailsThird Party Advisory
- https://github.com/prisma-labs/graphql-playground/commit/bf1883db538c97b076801a60677733816cb3cfb7Patch, Third Party Advisory
- https://github.com/prisma-labs/graphql-playground/security/advisories/GHSA-4852-vrh7-28rfMitigation, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.