GHSA-78x2-cwp9-5j42 Ghost's improper authentication allows access to member information and actions

• npm ghost: >= 4.46.0, < 5.89.5 → fixed in 5.89.5 • npm @tryghost/portal: >= 1.22.2, < 2.39.0 → fixed in 2.39.0

Impact Improper authentication on some endpoints used for member actions would allow an attacker to perform member-only actions, and read member information. Vulnerable versions This security vulnerability is present in Ghost v4.46.0-v5.89.5. Ghost(Pro) customers are automatically updated to fixed versions ahead of disclosure. If you're a self-hoster, please follow our update instructions. Patches v5.89.5 contains a fix for this issue. Workarounds Disable site membership in Ghost settings. For more information If you have any questions or comments about this advisory: • Email us at [email protected]