CVE-2021-47959
HighSummary
The WordPress Plugin WPGraphQL version 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, triggering server out-of-memory conditions and MySQL connection errors.
Risk Assessment
This vulnerability can lead to serious availability issues, impacting users and organizational operations. Resource exhaustion can result in downtime and potential data loss.
Recommendation
It is recommended to update the WPGraphQL plugin to the latest version to mitigate this vulnerability. Additionally, monitoring and limiting the number of requests to the GraphQL endpoint is advisable.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

