WPGraphQL, CVE-2021-47959

CVE, Research URL: CVE-2021-47959
Home page URL: Security reports for WPGraphQL
Application: WPGraphQL
Published on: May 16, 2026
Research Description: WordPress Plugin WPGraphQL 1.3.5 contains a denial of service vulnerability that allows unauthenticated attackers to exhaust server resources by sending batched GraphQL queries with duplicated fields. Attackers can send POST requests to the GraphQL endpoint with amplified field duplication payloads to trigger server out-of-memory conditions and MySQL connection errors.
Affected versions: max 1.3.5.
Status: vulnerable