CVE-2021-47959: Wpgraphql

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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 products

• Wpgraphql Wpgraphql: version 1.3.5 only

Published 2026-05-15. Last modified 2026-06-17.