The createComment mutation in the WPGraphQL 0.2.3 plugin for WordPress allows unauthenticated users to post comments on any article, even when 'allow comment' is disabled.
{ "versions": [ { "introduced": "0" }, { "last_affected": "0.2.3" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9881.json"