CVE-2021-47959

HIGH 7.5

WordPress Plugin WPGraphQL 1.3.5 Denial of Service

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-770
Vendor	wpgraphql
Product	wpgraphql
Published	May 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Wpgraphql / WPGraphQL

1.3.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Dolev Farhi