CVE-2021-47959
WordPress Plugin WPGraphQL 1.3.5 Denial of Service
- State
- Published
- Severity
- 8.7 High
- Published
- May 15, 2026
- Updated
- May 15, 2026
- Reserved
- Feb 1, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | 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 | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
WPGraphQLWpgraphql |
|
References
- ExploitDB-49807exploit
- Official Product Homepageproduct
- VulnCheck Advisory: WordPress Plugin WPGraphQL 1.3.5 Denial of Servicethird-party-advisory
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