High severity7.5NVD Advisory· Published May 15, 2026· Updated May 18, 2026

CVE-2021-47959

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Wp Graphql/Wp Graphqlllm-fuzzy
Range: =1.3.5
WordPress/Wp Graphqlwp-canonicalize
Package: https://wordpress.org/plugins/wp-graphql

Patches

Vulnerability mechanics

References

www.exploit-db.com/exploits/49807nvd
www.vulncheck.com/advisories/wordpress-plugin-wpgraphql-denial-of-servicenvd
www.wpgraphql.comnvd

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