Threats affecting pkg:github/Outline

Outline before 1.12.0 contains an incorrect authorization vulnerability in authorizeDocumentPublish() that allows authenticated members to publish documents into private collections without write access. Attackers can detach a child document via documents.unpublish, retaining parentDocumentId, then call documents.update with a private collection UUID to inject phishing content.

Outline before 1.12.0 contains an improper access control vulnerability that allows unauthenticated users to read unpublished documents because the share loader ignores unpublished status. Attackers holding an existing share link can query shares.info, documents.info, or the /s/ share routes to read withdrawn content, while shares.revoke returns 404 and blocks revocation.

Outline versions prior to 1.8.0 have an authorization vulnerability where deleted administrators continue to receive full document contents via webhooks. This occurs because the system does not disable webhook subscriptions for deleted users, allowing former admins to access document data including Markdown and Yjs data for workspace events.