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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.

PUBLISHED Reserved 2026-02-01 | Published 2026-05-15 | Updated 2026-05-15 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Allocation of Resources Without Limits or Throttling

Product status

1.3.5
affected

Credits

Dolev Farhi finder

References

www.exploit-db.com/exploits/49807 (ExploitDB-49807) exploit

www.wpgraphql.com/ (Official Product Homepage) product

www.vulncheck.com/...ress-plugin-wpgraphql-denial-of-service (VulnCheck Advisory: WordPress Plugin WPGraphQL 1.3.5 Denial of Service) third-party-advisory

cve.org (CVE-2021-47959)

nvd.nist.gov (CVE-2021-47959)

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