CVE-2021-47959

WordPress Plugin WPGraphQL 1.3.5 Denial of Service

CVSS 8.7 HIGHEPSS 0.5%CWE-770

Vexday Risk Score

41Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 8.7EPSS 0.5%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

15 May 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected products

Wpgraphql · WPGraphQL

public PoCs found — 1

cve_referencewww.exploit-db.com/exploits/49807unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

https://www.exploit-db.com/exploits/49807 https://www.vulncheck.com/advisories/wordpress-plugin-wpgraphql-denial-of-service https://www.wpgraphql.com/