CVE-2021-47959

WordPress Plugin WPGraphQL 1.3.5 Denial of Service

Published May 15, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Wpgraphql
Wpgraphql wpgraphql
Vendors & Products Wordpress
Wordpress wordpress
Wpgraphql
Wpgraphql wpgraphql
Type Values Removed Values Added
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.
Title WordPress Plugin WPGraphQL 1.3.5 Denial of Service
First Time appeared Wpengine
Wpengine wpgraphql
Weaknesses CWE-770
CPEs cpe:2.3:a:wpengine:wpgraphql:1.3.5:*:*:*:*:*:*:*
Vendors & Products Wpengine
Wpengine wpgraphql
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
May 15, 2026, 9:14 PM
Reserved
Feb 1, 2026, 11:24 AM
Status
Deferred
Published
May 15, 2026, 7:16 PM
Modified
Jun 17, 2026, 4:18 AM