Ghost: Member existence leak via magic link sign-in response

Impact A discrepancy in responses from the members signin endpoints made it possible for an unauthenticated attacker to determine whether a given email address belongs to a registered member of a Ghost site. Vulnerable versions This vulnerability is present in Ghost from v5.18.0 up to v6.21.0...

GHSA-7MPP-R37J-X5WH Ghost: Session Fixation in Ghost Admin

Impact Ghost Admin did not invalidate existing sessions on login which could have allowed for session fixation attacks. Successful exploitation would have required another vulnerability on the same domain where Ghost Admin was hosted. Vulnerable versions This vulnerability is present in Ghost fro...

GHSA-JM22-3W23-5Q7W Ghost: Blind Password Hash Disclosure in Ghost Admin API

Impact Any staff-level user was able to leak the hashed passwords of other staff users. An offline password-guessing attack against the hashes could lead to account takeover if successful, but Device Verification should have prevented an attacker from logging in with a recovered password. Dependi...