Vulnerability · Published May 15, 2026 · Assigned by VulnCheck

CVE-2021-47959WordPress Plugin WPGraphQL 1.3.5 Denial of Service

High 7.5

In plain English

A high-severity resource allocation without limits in WPGraphQL from Wpgraphql. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 39% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 60.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Wpgraphql	WPGraphQL	1.3.5

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

ExploitDB-49807 exploit
Official Product Homepage product
VulnCheck Advisory: WordPress Plugin WPGraphQL 1.3.5 Denial of Service third-party-advisory