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WPGraphQL before 2.24.1 contains a missing authorization vulnerability in the createComment mutation that allows unauthenticated attackers to comment on non-public posts by bypassing post status checks. Attackers can attach comments to draft, private, trashed, or password-protected posts to leak hidden titles via moderator notifications, enumerate post IDs, and backdate comments or mark them as pingbacks.

• https://github.com/wp-graphql/wp-graphql/security/advisories/GHSA-4vgv-vvxr-9fh9 vendor-advisory
• https://github.com/wp-graphql/wp-graphql/commit/b9da32bd8e6025e19a9b04acaa129978eba71177 patch
• https://github.com/wp-graphql/wp-graphql/blob/wp-graphql/v2.24.0/plugins/wp-graphql/src/Mutation/CommentCreate.php technical-description
• https://github.com/wp-graphql/wp-graphql/releases/tag/wp-graphql%2Fv2.24.1 release-notes
• https://github.com/wp-graphql/wp-graphql product
• https://www.vulncheck.com/advisories/wpgraphql-before-2.24.1-missing-authorization-via-createcomment-mutation third-party-advisory